diff --git a/.gitignore b/.gitignore
index b20ccc9..7d4d38f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -11,7 +11,8 @@ build/
 *.py[co]
 __py_cache__/
 # IDE files
+.cache/
 .clangd/
+.idea/
 .vscode/
-.idea
 compile_commands.json
diff --git a/CMakeLists.txt b/CMakeLists.txt
index e8c505c..3d87a31 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -45,7 +45,8 @@ if(SAPI_HARDENED_SOURCE)
 endif()
 
 # Sapi CMake modules, order matters
-list(APPEND CMAKE_MODULE_PATH "${SAPI_SOURCE_DIR}/cmake")
+list(APPEND CMAKE_MODULE_PATH "${SAPI_SOURCE_DIR}/cmake"
+                              "${SAPI_SOURCE_DIR}/cmake/modules")
 include(SapiOptions)
 include(SapiDeps)
 include(SapiUtil)
diff --git a/cmake/FindLibcap.cmake b/cmake/FindLibcap.cmake
deleted file mode 100644
index 411a54f..0000000
--- a/cmake/FindLibcap.cmake
+++ /dev/null
@@ -1,34 +0,0 @@
-# Copyright 2019 Google LLC
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-# On Debian, install libcap-dev to use this module.
-
-find_path(libcap_INCLUDE_DIR sys/capability.h)
-# Look for static library only.
-find_library(libcap_LIBRARY cap)
-mark_as_advanced(libcap_INCLUDE_DIR libcap_LIBRARY)
-
-include(FindPackageHandleStandardArgs)
-find_package_handle_standard_args(libcap
-  REQUIRED_VARS libcap_LIBRARY libcap_INCLUDE_DIR
-)
-
-if(libcap_FOUND AND NOT TARGET libcap::libcap)
-  add_library(libcap::libcap UNKNOWN IMPORTED)
-  set_target_properties(libcap::libcap PROPERTIES
-    IMPORTED_LINK_INTERFACE_LANGUAGES "C"
-    IMPORTED_LOCATION "${libcap_LIBRARY}"
-    INTERFACE_INCLUDE_DIRECTORIES "${libcap_INCLUDE_DIR}"
-  )
-endif()
diff --git a/cmake/FindLibffi.cmake b/cmake/FindLibffi.cmake
deleted file mode 100644
index 59139cd..0000000
--- a/cmake/FindLibffi.cmake
+++ /dev/null
@@ -1,34 +0,0 @@
-# Copyright 2019 Google LLC
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-# On Debian, install libffi-dev to use this module.
-
-find_path(libffi_INCLUDE_DIR ffitarget.h)
-# Look for static library only.
-find_library(libffi_LIBRARY ffi)
-mark_as_advanced(libffi_INCLUDE_DIR libffi_LIBRARY)
-
-include(FindPackageHandleStandardArgs)
-find_package_handle_standard_args(libffi
-  REQUIRED_VARS libffi_LIBRARY libffi_INCLUDE_DIR
-)
-
-if(libffi_FOUND AND NOT TARGET libffi::libffi)
-  add_library(libffi::libffi UNKNOWN IMPORTED)
-  set_target_properties(libffi::libffi PROPERTIES
-    IMPORTED_LINK_INTERFACE_LANGUAGES "C"
-    IMPORTED_LOCATION "${libffi_LIBRARY}"
-    INTERFACE_INCLUDE_DIRECTORIES "${libffi_INCLUDE_DIR}"
-  )
-endif()
diff --git a/cmake/SapiDeps.cmake b/cmake/SapiDeps.cmake
index 79d9c2a..691dcdf 100644
--- a/cmake/SapiDeps.cmake
+++ b/cmake/SapiDeps.cmake
@@ -38,56 +38,56 @@ endif()
 
 if(SAPI_ENABLE_TESTS)
   if(SAPI_DOWNLOAD_GOOGLETEST)
-    include(cmake/googletest/Download.cmake)
+    include(cmake/googletest.cmake)
   endif()
   check_target(gtest)
   check_target(gtest_main)
   check_target(gmock)
 
   if(SAPI_DOWNLOAD_BENCHMARK)
-    include(cmake/benchmark/Download.cmake)
+    include(cmake/benchmark.cmake)
   endif()
   check_target(benchmark)
 endif()
 
 if(SAPI_DOWNLOAD_ABSL)
-  include(cmake/abseil/Download.cmake)
+  include(cmake/abseil-cpp.cmake)
 endif()
 check_target(absl::core_headers)
 
 if(SAPI_DOWNLOAD_LIBCAP)
-  include(cmake/libcap/Download.cmake)
+  include(cmake/libcap.cmake)
   check_target(libcap::libcap)
 else()
   find_package(Libcap REQUIRED)
 endif()
 
 if(SAPI_DOWNLOAD_LIBFFI)
-  include(cmake/libffi/Download.cmake)
+  include(cmake/libffi.cmake)
   check_target(libffi::libffi)
 else()
   find_package(Libffi REQUIRED)
 endif()
 
 if(SAPI_DOWNLOAD_LIBUNWIND)
-  include(cmake/libunwind/Download.cmake)
+  include(cmake/libunwind.cmake)
 endif()
 check_target(unwind_ptrace_wrapped)
 
 if(SAPI_DOWNLOAD_GFLAGS)
-  include(cmake/gflags/Download.cmake)
+  include(cmake/gflags.cmake)
 endif()
 check_target(gflags)
 
 if(SAPI_DOWNLOAD_GLOG)
-  include(cmake/glog/Download.cmake)
+  include(cmake/glog.cmake)
 endif()
 check_target(glog::glog)
 
 add_dependencies(glog gflags::gflags)
 
 if(SAPI_DOWNLOAD_PROTOBUF)
-  include(cmake/protobuf/Download.cmake)
+  include(cmake/protobuf.cmake)
   check_target(protobuf::libprotobuf)
   check_target(protobuf::protoc)
 else()
@@ -96,7 +96,7 @@ endif()
 
 if(SAPI_ENABLE_EXAMPLES)
   if(SAPI_DOWNLOAD_ZLIB)
-    include(cmake/zlib/Download.cmake)
+    include(cmake/zlib.cmake)
     check_target(ZLIB::ZLIB)
   else()
     find_package(ZLIB REQUIRED)
diff --git a/cmake/abseil/CMakeLists.txt.in b/cmake/abseil/CMakeLists.txt.in
deleted file mode 100644
index 8222d85..0000000
--- a/cmake/abseil/CMakeLists.txt.in
+++ /dev/null
@@ -1,28 +0,0 @@
-# Copyright 2019 Google LLC
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-cmake_minimum_required(VERSION 3.12)
-project(absl-download NONE)
-
-include(ExternalProject)
-ExternalProject_Add(absl
-  GIT_REPOSITORY    https://github.com/abseil/abseil-cpp
-  GIT_TAG           4fd9a1ec5077daac14eeee05df931d658ec0b7b8 # 2020-11-19
-  SOURCE_DIR        "${CMAKE_BINARY_DIR}/absl-src"
-  BINARY_DIR        "${CMAKE_BINARY_DIR}/absl-build"
-  CONFIGURE_COMMAND ""
-  BUILD_COMMAND     ""
-  INSTALL_COMMAND   ""
-  TEST_COMMAND      ""
-)
diff --git a/cmake/abseil/Download.cmake b/cmake/abseil/Download.cmake
deleted file mode 100644
index c76afe3..0000000
--- a/cmake/abseil/Download.cmake
+++ /dev/null
@@ -1,53 +0,0 @@
-# Copyright 2019 Google LLC
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-# Downloads and unpacks Abseil at configure time
-
-set(workdir "${CMAKE_BINARY_DIR}/absl-download")
-
-configure_file("${CMAKE_CURRENT_LIST_DIR}/CMakeLists.txt.in"
-               "${workdir}/CMakeLists.txt")
-execute_process(COMMAND ${CMAKE_COMMAND} -G "${CMAKE_GENERATOR}" .
-                RESULT_VARIABLE error
-                WORKING_DIRECTORY "${workdir}")
-if(error)
-  message(FATAL_ERROR "CMake step for ${PROJECT_NAME} failed: ${error}")
-endif()
-
-execute_process(COMMAND ${CMAKE_COMMAND} --build .
-                RESULT_VARIABLE error
-                WORKING_DIRECTORY "${workdir}")
-if(error)
-  message(FATAL_ERROR "Build step for ${PROJECT_NAME} failed: ${error}")
-endif()
-
-set(_sapi_saved_CMAKE_CXX_STANDARD ${CMAKE_CXX_STANDARD})
-set(_sapi_saved_BUILD_TESTING ${BUILD_TESTING})
-
-set(CMAKE_CXX_STANDARD ${SAPI_CXX_STANDARD})
-set(ABSL_USE_GOOGLETEST_HEAD OFF CACHE BOOL "" FORCE)
-set(ABSL_RUN_TESTS OFF CACHE BOOL "" FORCE)
-set(BUILD_TESTING OFF)  # Avoid errors when re-configuring SAPI
-set(ABSL_CXX_STANDARD ${SAPI_CXX_STANDARD} CACHE STRING "" FORCE)
-set(ABSL_ENABLE_INSTALL ON CACHE BOOL "" FORCE)
-
-add_subdirectory("${CMAKE_BINARY_DIR}/absl-src"
-                 "${CMAKE_BINARY_DIR}/absl-build" EXCLUDE_FROM_ALL)
-
-if(_sapi_saved_BUILD_TESTING)
-  set(BUILD_TESTING "${_sapi_saved_BUILD_TESTING}")
-endif()
-if(_sapi_saved_CMAKE_CXX_STANDARD)
-  set(CMAKE_CXX_STANDARD "${_sapi_saved_CMAKE_CXX_STANDARD}")
-endif()
diff --git a/cmake/benchmark/CMakeLists.txt.in b/cmake/benchmark/CMakeLists.txt.in
deleted file mode 100644
index e2dc7f7..0000000
--- a/cmake/benchmark/CMakeLists.txt.in
+++ /dev/null
@@ -1,28 +0,0 @@
-# Copyright 2019 Google LLC
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-cmake_minimum_required(VERSION 3.12)
-project(benchmark-download NONE)
-
-include(ExternalProject)
-ExternalProject_Add(benchmark
-  GIT_REPOSITORY    https://github.com/google/benchmark.git
-  GIT_TAG           56898e9a92fba537671d5462df9c5ef2ea6a823a  # 2020-04-23
-  SOURCE_DIR        "${CMAKE_BINARY_DIR}/benchmark-src"
-  BINARY_DIR        "${CMAKE_BINARY_DIR}/benchmark-build"
-  CONFIGURE_COMMAND ""
-  BUILD_COMMAND     ""
-  INSTALL_COMMAND   ""
-  TEST_COMMAND      ""
-)
diff --git a/cmake/benchmark/Download.cmake b/cmake/benchmark/Download.cmake
deleted file mode 100644
index 8bc622b..0000000
--- a/cmake/benchmark/Download.cmake
+++ /dev/null
@@ -1,40 +0,0 @@
-# Copyright 2019 Google LLC
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-# Downloads and unpacks Benchmark at configure time
-
-set(workdir "${CMAKE_BINARY_DIR}/benchmark-download")
-
-configure_file("${CMAKE_CURRENT_LIST_DIR}/CMakeLists.txt.in"
-               "${workdir}/CMakeLists.txt")
-execute_process(COMMAND ${CMAKE_COMMAND} -G "${CMAKE_GENERATOR}" .
-                RESULT_VARIABLE error
-                WORKING_DIRECTORY "${workdir}")
-if(error)
-  message(FATAL_ERROR "CMake step for ${PROJECT_NAME} failed: ${error}")
-endif()
-
-execute_process(COMMAND ${CMAKE_COMMAND} --build .
-                RESULT_VARIABLE error
-                WORKING_DIRECTORY "${workdir}")
-if(error)
-  message(FATAL_ERROR "Build step for ${PROJECT_NAME} failed: ${error}")
-endif()
-
-set(BENCHMARK_ENABLE_TESTING OFF)
-set(BENCHMARK_ENABLE_EXCEPTIONS OFF)
-set(BENCHMARK_ENABLE_GTEST_TESTS OFF)
-
-add_subdirectory("${CMAKE_BINARY_DIR}/benchmark-src"
-                 "${CMAKE_BINARY_DIR}/benchmark-build" EXCLUDE_FROM_ALL)
diff --git a/cmake/gflags/CMakeLists.txt.in b/cmake/gflags/CMakeLists.txt.in
deleted file mode 100644
index 6428456..0000000
--- a/cmake/gflags/CMakeLists.txt.in
+++ /dev/null
@@ -1,28 +0,0 @@
-# Copyright 2019 Google LLC
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-cmake_minimum_required(VERSION 3.12)
-project(gflags-download NONE)
-
-include(ExternalProject)
-ExternalProject_Add(gflags
-  GIT_REPOSITORY    https://github.com/gflags/gflags.git
-  GIT_TAG           addd749114fab4f24b7ea1e0f2f837584389e52c  # 2020-03-18
-  SOURCE_DIR        "${CMAKE_BINARY_DIR}/gflags-src"
-  BINARY_DIR        "${CMAKE_BINARY_DIR}/gflags-build"
-  CONFIGURE_COMMAND ""
-  BUILD_COMMAND     ""
-  INSTALL_COMMAND   ""
-  TEST_COMMAND      ""
-)
diff --git a/cmake/gflags/Download.cmake b/cmake/gflags/Download.cmake
deleted file mode 100644
index 00a006d..0000000
--- a/cmake/gflags/Download.cmake
+++ /dev/null
@@ -1,42 +0,0 @@
-# Copyright 2019 Google LLC
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-# Downloads and unpacks gflags at configure time
-
-set(workdir "${CMAKE_BINARY_DIR}/gflags-download")
-
-configure_file("${CMAKE_CURRENT_LIST_DIR}/CMakeLists.txt.in"
-               "${workdir}/CMakeLists.txt")
-execute_process(COMMAND ${CMAKE_COMMAND} -G "${CMAKE_GENERATOR}" .
-                RESULT_VARIABLE error
-                WORKING_DIRECTORY "${workdir}")
-if(error)
-  message(FATAL_ERROR "CMake step for ${PROJECT_NAME} failed: ${error}")
-endif()
-
-execute_process(COMMAND ${CMAKE_COMMAND} --build .
-                RESULT_VARIABLE error
-                WORKING_DIRECTORY "${workdir}")
-if(error)
-  message(FATAL_ERROR "Build step for ${PROJECT_NAME} failed: ${error}")
-endif()
-
-set(GFLAGS_IS_SUBPROJECT TRUE)
-set(GFLAGS_BUILD_SHARED_LIBS ${SAPI_ENABLE_SHARED_LIBS})
-set(GFLAGS_INSTALL_SHARED_LIBS ${SAPI_ENABLE_SHARED_LIBS})
-set(GFLAGS_INSTALL_HEADERS OFF) # TODO: Temporary off
-set(GFLAGS_BUILD_TESTING FALSE)
-
-add_subdirectory("${CMAKE_BINARY_DIR}/gflags-src"
-                 "${CMAKE_BINARY_DIR}/gflags-build" EXCLUDE_FROM_ALL)
diff --git a/cmake/glog/CMakeLists.txt.in b/cmake/glog/CMakeLists.txt.in
deleted file mode 100644
index 2fad67d..0000000
--- a/cmake/glog/CMakeLists.txt.in
+++ /dev/null
@@ -1,28 +0,0 @@
-# Copyright 2019 Google LLC
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-cmake_minimum_required(VERSION 3.12)
-project(glog-download NONE)
-
-include(ExternalProject)
-ExternalProject_Add(glog
-  GIT_REPOSITORY    https://github.com/google/glog.git
-  GIT_TAG           3ba8976592274bc1f907c402ce22558011d6fc5e  # 2020-02-16
-  SOURCE_DIR        "${CMAKE_BINARY_DIR}/glog-src"
-  BINARY_DIR        "${CMAKE_BINARY_DIR}/glog-build"
-  CONFIGURE_COMMAND ""
-  BUILD_COMMAND     ""
-  INSTALL_COMMAND   ""
-  TEST_COMMAND      ""
-)
diff --git a/cmake/glog/Download.cmake b/cmake/glog/Download.cmake
deleted file mode 100644
index 91755f4..0000000
--- a/cmake/glog/Download.cmake
+++ /dev/null
@@ -1,68 +0,0 @@
-# Copyright 2019 Google LLC
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-# Downloads and unpacks glog at configure time
-
-# Allows use target_link_libraries() with targets in other directories.
-if(POLICY CMP0079)
-  cmake_policy(SET CMP0079 NEW)
-endif()
-
-set(workdir "${CMAKE_BINARY_DIR}/glog-download")
-
-configure_file("${CMAKE_CURRENT_LIST_DIR}/CMakeLists.txt.in"
-               "${workdir}/CMakeLists.txt")
-execute_process(COMMAND "${CMAKE_COMMAND}" -G "${CMAKE_GENERATOR}" .
-                RESULT_VARIABLE error
-                WORKING_DIRECTORY "${workdir}")
-if(error)
-  message(FATAL_ERROR "CMake step for ${PROJECT_NAME} failed: ${error}")
-endif()
-
-execute_process(COMMAND "${CMAKE_COMMAND}" --build .
-                RESULT_VARIABLE error
-                WORKING_DIRECTORY "${workdir}")
-if(error)
-  message(FATAL_ERROR "Build step for ${PROJECT_NAME} failed: ${error}")
-endif()
-
-# Force gflags from subdirectory
-set(WITH_GFLAGS OFF CACHE BOOL "" FORCE)
-set(HAVE_LIB_GFLAGS 1 CACHE STRING "" FORCE)
-
-set(WITH_UNWIND OFF CACHE BOOL "" FORCE)
-set(UNWIND_LIBRARY FALSE)
-set(HAVE_PWD_H FALSE)
-
-set(WITH_PKGCONFIG ON CACHE BOOL "" FORCE)
-
-set(_glog_BUILD_TESTING ${BUILD_TESTING})
-set(BUILD_TESTING FALSE)
-set(BUILD_SHARED_LIBS ${SAPI_ENABLE_SHARED_LIBS})
-add_subdirectory("${CMAKE_BINARY_DIR}/glog-src"
-                 "${CMAKE_BINARY_DIR}/glog-build" EXCLUDE_FROM_ALL)
-set(BUILD_TESTING ${_glog_BUILD_TESTING})
-set(_glog_BUILD_TESTING)
-target_include_directories(glog PUBLIC
-  $<BUILD_INTERFACE:${CMAKE_BINARY_DIR}/gflags-build/include>
-  $<BUILD_INTERFACE:${CMAKE_BINARY_DIR}/glog-build>
-)
-add_library(gflags_nothreads STATIC IMPORTED)
-set_target_properties(gflags_nothreads PROPERTIES
-  IMPORTED_LOCATION "${CMAKE_BINARY_DIR}/gflags-build/libgflags_nothreads.a")
-target_link_libraries(glog PRIVATE
-  -Wl,--whole-archive
-  gflags_nothreads
-  -Wl,--no-whole-archive
-)
diff --git a/cmake/googletest/CMakeLists.txt.in b/cmake/googletest/CMakeLists.txt.in
deleted file mode 100644
index 09a7f36..0000000
--- a/cmake/googletest/CMakeLists.txt.in
+++ /dev/null
@@ -1,28 +0,0 @@
-# Copyright 2019 Google LLC
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-cmake_minimum_required(VERSION 3.12)
-project(googletest-download NONE)
-
-include(ExternalProject)
-ExternalProject_Add(googletest
-  GIT_REPOSITORY    https://github.com/google/googletest.git
-  GIT_TAG           dcc92d0ab6c4ce022162a23566d44f673251eee4  # 2020-04-16
-  SOURCE_DIR        "${CMAKE_BINARY_DIR}/googletest-src"
-  BINARY_DIR        "${CMAKE_BINARY_DIR}/googletest-build"
-  CONFIGURE_COMMAND ""
-  BUILD_COMMAND     ""
-  INSTALL_COMMAND   ""
-  TEST_COMMAND      ""
-)
diff --git a/cmake/googletest/Download.cmake b/cmake/googletest/Download.cmake
deleted file mode 100644
index cbb28e4..0000000
--- a/cmake/googletest/Download.cmake
+++ /dev/null
@@ -1,38 +0,0 @@
-# Copyright 2019 Google LLC
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-# Downloads and unpacks Googletest at configure time
-
-set(workdir "${CMAKE_BINARY_DIR}/googletest-download")
-
-configure_file("${CMAKE_CURRENT_LIST_DIR}/CMakeLists.txt.in"
-               "${workdir}/CMakeLists.txt")
-execute_process(COMMAND ${CMAKE_COMMAND} -G "${CMAKE_GENERATOR}" .
-                RESULT_VARIABLE error
-                WORKING_DIRECTORY "${workdir}")
-if(error)
-  message(FATAL_ERROR "CMake step for ${PROJECT_NAME} failed: ${error}")
-endif()
-
-execute_process(COMMAND ${CMAKE_COMMAND} --build .
-                RESULT_VARIABLE error
-                WORKING_DIRECTORY "${workdir}")
-if(error)
-  message(FATAL_ERROR "Build step for ${PROJECT_NAME} failed: ${error}")
-endif()
-
-set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)
-
-add_subdirectory("${CMAKE_BINARY_DIR}/googletest-src"
-                 "${CMAKE_BINARY_DIR}/googletest-build" EXCLUDE_FROM_ALL)
diff --git a/cmake/libcap/CMakeLists.txt.in b/cmake/libcap/CMakeLists.txt.in
deleted file mode 100644
index 40ac904..0000000
--- a/cmake/libcap/CMakeLists.txt.in
+++ /dev/null
@@ -1,27 +0,0 @@
-# Copyright 2019 Google LLC
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-cmake_minimum_required(VERSION 3.12)
-project(libcap-download NONE)
-
-include(ExternalProject)
-ExternalProject_Add(libcap
-  URL https://www.kernel.org/pub/linux/libs/security/linux-privs/libcap2/libcap-2.27.tar.gz
-  URL_HASH SHA256=260b549c154b07c3cdc16b9ccc93c04633c39f4fb6a4a3b8d1fa5b8a9c3f5fe8 # 2019-04-16
-  SOURCE_DIR        "${CMAKE_BINARY_DIR}/libcap-src"
-  CONFIGURE_COMMAND ""
-  BUILD_COMMAND     ""
-  INSTALL_COMMAND   ""
-  TEST_COMMAND      ""
-)
diff --git a/cmake/libcap/Download.cmake b/cmake/libcap/Download.cmake
deleted file mode 100644
index 1ef10b3..0000000
--- a/cmake/libcap/Download.cmake
+++ /dev/null
@@ -1,103 +0,0 @@
-# Copyright 2019 Google LLC
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-# Downloads and unpacks libunwind at configure time
-
-set(workdir "${CMAKE_BINARY_DIR}/libcap-download")
-
-configure_file("${CMAKE_CURRENT_LIST_DIR}/CMakeLists.txt.in"
-               "${workdir}/CMakeLists.txt")
-execute_process(COMMAND ${CMAKE_COMMAND} -G "${CMAKE_GENERATOR}" .
-                RESULT_VARIABLE error
-                WORKING_DIRECTORY "${workdir}")
-if(error)
-  message(FATAL_ERROR "CMake step for ${PROJECT_NAME} failed: ${error}")
-endif()
-
-execute_process(COMMAND ${CMAKE_COMMAND} --build .
-                RESULT_VARIABLE error
-                WORKING_DIRECTORY "${workdir}")
-if(error)
-  message(FATAL_ERROR "Build step for ${PROJECT_NAME} failed: ${error}")
-endif()
-
-set(_cap_src "${CMAKE_BINARY_DIR}/libcap-src")
-
-set(libcap_INCLUDE_DIR ${_cap_src}/libcap/include)
-
-add_custom_command(OUTPUT ${_cap_src}/libcap/cap_names.list.h
-  VERBATIM
-  # Use the same logic as libcap/Makefile
-  COMMAND sed -ne [=[/^#define[ \\t]CAP[_A-Z]\+[ \\t]\+[0-9]\+/{s/^#define \([^ \\t]*\)[ \\t]*\([^ \\t]*\)/\{\"\1\",\2\},/p;}]=]
-              ${_cap_src}/libcap/include/uapi/linux/capability.h |
-          tr [:upper:] [:lower:] > ${_cap_src}/libcap/cap_names.list.h
-)
-
-if (CMAKE_CROSSCOMPILING AND BUILD_C_COMPILER)
-  add_custom_command(OUTPUT ${_cap_src}/libcap/libcap_makenames
-    VERBATIM
-    # Use the same logic as libcap/Makefile
-    COMMAND ${BUILD_C_COMPILER} ${BUILD_C_FLAGS} ${_cap_src}/libcap/_makenames.c -o ${_cap_src}/libcap/libcap_makenames
-    DEPENDS ${_cap_src}/libcap/cap_names.list.h ${_cap_src}/libcap/_makenames.c
-  )
-
-  add_custom_command(OUTPUT ${_cap_src}/libcap/cap_names.h
-    COMMAND ${_cap_src}/libcap/libcap_makenames > ${_cap_src}/libcap/cap_names.h
-    DEPENDS ${_cap_src}/libcap/libcap_makenames
-  )
-else()
-  add_executable(libcap_makenames
-    ${_cap_src}/libcap/cap_names.list.h
-    ${_cap_src}/libcap/_makenames.c
-  )
-
-  target_include_directories(libcap_makenames PUBLIC
-    ${_cap_src}/libcap
-    ${_cap_src}/libcap/include
-    ${_cap_src}/libcap/include/uapi
-  )
-
-  add_custom_command(OUTPUT ${_cap_src}/libcap/cap_names.h
-    COMMAND libcap_makenames > ${_cap_src}/libcap/cap_names.h
-  )
-endif()
-
-add_library(cap STATIC
-  ${_cap_src}/libcap/cap_alloc.c
-  ${_cap_src}/libcap/cap_extint.c
-  ${_cap_src}/libcap/cap_file.c
-  ${_cap_src}/libcap/cap_flag.c
-  ${_cap_src}/libcap/cap_names.h
-  ${_cap_src}/libcap/cap_proc.c
-  ${_cap_src}/libcap/cap_text.c
-  ${_cap_src}/libcap/include/uapi/linux/capability.h
-  ${_cap_src}/libcap/libcap.h
-)
-add_library(libcap::libcap ALIAS cap)
-target_include_directories(cap PUBLIC
-  ${_cap_src}/libcap
-  ${_cap_src}/libcap/include
-  ${_cap_src}/libcap/include/uapi
-)
-target_compile_options(cap PRIVATE
-  -Wno-tautological-compare
-  -Wno-unused-result
-)
-target_compile_definitions(cap PRIVATE
-  # Work around sys/xattr.h not declaring this
-  -DXATTR_NAME_CAPS="\"security.capability\""
-)
-target_link_libraries(cap PRIVATE
-  sapi::base
-)
diff --git a/cmake/libffi/CMakeLists.txt.in b/cmake/libffi/CMakeLists.txt.in
deleted file mode 100644
index 8712d2e..0000000
--- a/cmake/libffi/CMakeLists.txt.in
+++ /dev/null
@@ -1,31 +0,0 @@
-# Copyright 2020 Google LLC
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-cmake_minimum_required(VERSION 3.12)
-project(libffi-download NONE)
-
-include(ExternalProject)
-ExternalProject_Add(libffi
-  URL https://github.com/libffi/libffi/releases/download/v3.3-rc2/libffi-3.3-rc2.tar.gz
-  URL_HASH SHA256=653ffdfc67fbb865f39c7e5df2a071c0beb17206ebfb0a9ecb18a18f63f6b263 # 2019-11-02
-  SOURCE_DIR        "${CMAKE_BINARY_DIR}/libffi-src"
-  CONFIGURE_COMMAND ./configure
-                    --disable-dependency-tracking
-                    --disable-builddir
-                    ${SAPI_THIRD_PARTY_CONFIGUREOPTS}
-  BUILD_COMMAND     ""
-  INSTALL_COMMAND   ""
-  TEST_COMMAND      ""
-  BUILD_IN_SOURCE TRUE
-)
diff --git a/cmake/libffi/Download.cmake b/cmake/libffi/Download.cmake
deleted file mode 100644
index 168f8d8..0000000
--- a/cmake/libffi/Download.cmake
+++ /dev/null
@@ -1,97 +0,0 @@
-# Copyright 2020 Google LLC
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-# Downloads and unpacks libunwind at configure time
-
-set(workdir "${CMAKE_BINARY_DIR}/libffi-download")
-
-configure_file("${CMAKE_CURRENT_LIST_DIR}/CMakeLists.txt.in"
-               "${workdir}/CMakeLists.txt")
-execute_process(COMMAND ${CMAKE_COMMAND} -G "${CMAKE_GENERATOR}" .
-                RESULT_VARIABLE error
-                WORKING_DIRECTORY "${workdir}")
-if(error)
-  message(FATAL_ERROR "CMake step for ${PROJECT_NAME} failed: ${error}")
-endif()
-
-execute_process(COMMAND ${CMAKE_COMMAND} --build .
-                RESULT_VARIABLE error
-                WORKING_DIRECTORY "${workdir}")
-if(error)
-  message(FATAL_ERROR "Build step for ${PROJECT_NAME} failed: ${error}")
-endif()
-
-set(_ffi_src "${CMAKE_BINARY_DIR}/libffi-src")
-
-set(libffi_INCLUDE_DIR ${_ffi_src}/libffi/include)
-
-if(CMAKE_SYSTEM_PROCESSOR STREQUAL "x86_64")
-  list(APPEND _ffi_platform_srcs
-    ${_ffi_src}/src/x86/asmnames.h
-    ${_ffi_src}/src/x86/ffi.c
-    ${_ffi_src}/src/x86/ffi64.c
-    ${_ffi_src}/src/x86/ffiw64.c
-    ${_ffi_src}/src/x86/internal.h
-    ${_ffi_src}/src/x86/internal64.h
-    ${_ffi_src}/src/x86/sysv.S
-    ${_ffi_src}/src/x86/unix64.S
-    ${_ffi_src}/src/x86/win64.S
-  )
-elseif(CMAKE_SYSTEM_PROCESSOR STREQUAL "ppc64")
-  list(APPEND _ffi_platform_srcs
-    ${_ffi_src}/src/powerpc/ffi.c
-    ${_ffi_src}/src/powerpc/ffi_linux64.c
-    ${_ffi_src}/src/powerpc/ffi_sysv.c
-    ${_ffi_src}/src/powerpc/linux64.S
-    ${_ffi_src}/src/powerpc/linux64_closure.S
-    ${_ffi_src}/src/powerpc/ppc_closure.S
-    ${_ffi_src}/src/powerpc/sysv.S
-    # Textual headers
-    ${_ffi_src}/src/powerpc/ffi_powerpc.h
-    ${_ffi_src}/src/powerpc/asm.h
-  )
-elseif(CMAKE_SYSTEM_PROCESSOR STREQUAL "aarch64")
-  list(APPEND _ffi_platform_srcs
-    ${_ffi_src}/src/aarch64/ffi.c
-    ${_ffi_src}/src/aarch64/internal.h
-    ${_ffi_src}/src/aarch64/sysv.S
-  )
-endif()
-
-add_library(ffi STATIC
-  ${_ffi_src}/fficonfig.h
-  ${_ffi_src}/include/ffi.h
-  ${_ffi_src}/include/ffi_cfi.h
-  ${_ffi_src}/include/ffi_common.h
-  ${_ffi_src}/include/ffitarget.h
-  ${_ffi_src}/src/closures.c
-  ${_ffi_src}/src/debug.c
-  ${_ffi_src}/src/java_raw_api.c
-  ${_ffi_src}/src/prep_cif.c
-  ${_ffi_src}/src/raw_api.c
-  ${_ffi_src}/src/types.c
-  ${_ffi_platform_srcs}
-)
-add_library(libffi::libffi ALIAS ffi)
-target_include_directories(ffi PUBLIC
-  ${_ffi_src}
-  ${_ffi_src}/include
-)
-target_compile_options(ffi PRIVATE
-  -Wno-vla
-  -Wno-unused-result
-)
-target_link_libraries(ffi PRIVATE
-  sapi::base
-)
diff --git a/cmake/libunwind/CMakeLists.txt.in b/cmake/libunwind/CMakeLists.txt.in
deleted file mode 100644
index 1216958..0000000
--- a/cmake/libunwind/CMakeLists.txt.in
+++ /dev/null
@@ -1,34 +0,0 @@
-# Copyright 2019 Google LLC
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-cmake_minimum_required(VERSION 3.12)
-project(libunwind-download NONE)
-
-include(ExternalProject)
-ExternalProject_Add(libunwind
-  URL https://github.com/libunwind/libunwind/releases/download/v1.2.1/libunwind-1.2.1.tar.gz
-  URL_HASH SHA256=3f3ecb90e28cbe53fba7a4a27ccce7aad188d3210bb1964a923a731a27a75acb
-  SOURCE_DIR        "${CMAKE_BINARY_DIR}/libunwind-src"
-  CONFIGURE_COMMAND ./configure
-                    --disable-dependency-tracking
-                    --disable-documentation
-                    --disable-minidebuginfo
-                    --disable-shared
-                    --enable-ptrace
-                    ${SAPI_THIRD_PARTY_CONFIGUREOPTS}
-  BUILD_COMMAND     ""
-  INSTALL_COMMAND   ""
-  TEST_COMMAND      ""
-  BUILD_IN_SOURCE TRUE
-)
diff --git a/cmake/libunwind/Download.cmake b/cmake/libunwind/Download.cmake
deleted file mode 100644
index 88221a8..0000000
--- a/cmake/libunwind/Download.cmake
+++ /dev/null
@@ -1,212 +0,0 @@
-# Copyright 2019 Google LLC
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-# Downloads and unpacks libunwind at configure time
-
-set(workdir "${CMAKE_BINARY_DIR}/libunwind-download")
-
-configure_file("${CMAKE_CURRENT_LIST_DIR}/CMakeLists.txt.in"
-               "${workdir}/CMakeLists.txt")
-execute_process(COMMAND ${CMAKE_COMMAND} -G "${CMAKE_GENERATOR}" .
-                RESULT_VARIABLE error
-                WORKING_DIRECTORY "${workdir}")
-if(error)
-  message(FATAL_ERROR "CMake step for ${PROJECT_NAME} failed: ${error}")
-endif()
-
-execute_process(COMMAND ${CMAKE_COMMAND} --build .
-                RESULT_VARIABLE error
-                WORKING_DIRECTORY "${workdir}")
-if(error)
-  message(FATAL_ERROR "Build step for ${PROJECT_NAME} failed: ${error}")
-endif()
-
-set(_unwind_src "${CMAKE_BINARY_DIR}/libunwind-src")
-
-if(CMAKE_SYSTEM_PROCESSOR STREQUAL "x86_64")
-  set(_unwind_cpu "x86_64")
-  list(APPEND _unwind_platform_srcs
-    ${_unwind_src}/src/x86_64/Gcreate_addr_space.c
-    ${_unwind_src}/src/x86_64/Gglobal.c
-    ${_unwind_src}/src/x86_64/Ginit.c
-    ${_unwind_src}/src/x86_64/Gos-linux.c
-    ${_unwind_src}/src/x86_64/Gregs.c
-    ${_unwind_src}/src/x86_64/Gresume.c
-    ${_unwind_src}/src/x86_64/Gstash_frame.c
-    ${_unwind_src}/src/x86_64/Gstep.c
-    ${_unwind_src}/src/x86_64/is_fpreg.c
-    ${_unwind_src}/src/x86_64/setcontext.S
-  )
-  list(APPEND _unwind_ptrace_srcs
-    ${_unwind_src}/src/x86_64/Ginit_remote.c
-  )
-elseif(CMAKE_SYSTEM_PROCESSOR STREQUAL "ppc64")
-  set(_unwind_cpu "ppc64")
-  list(APPEND _unwind_platform_srcs
-    ${_unwind_src}/src/ppc/Gis_signal_frame.c
-    ${_unwind_src}/src/ppc64/Gcreate_addr_space.c
-    ${_unwind_src}/src/ppc64/Gglobal.c
-    ${_unwind_src}/src/ppc64/Ginit.c
-    ${_unwind_src}/src/ppc64/Gregs.c
-    ${_unwind_src}/src/ppc64/Gresume.c
-    ${_unwind_src}/src/ppc64/Gstep.c
-    ${_unwind_src}/src/ppc64/get_func_addr.c
-    ${_unwind_src}/src/ppc64/is_fpreg.c
-  )
-  list(APPEND _unwind_ptrace_srcs
-    ${_unwind_src}/src/ppc/Ginit_remote.c
-  )
-elseif(CMAKE_SYSTEM_PROCESSOR STREQUAL "aarch64")
-  set(_unwind_cpu "aarch64")
-  list(APPEND _unwind_platform_srcs
-    ${_unwind_src}/src/aarch64/Gcreate_addr_space.c
-    ${_unwind_src}/src/aarch64/Gglobal.c
-    ${_unwind_src}/src/aarch64/Ginit.c
-    ${_unwind_src}/src/aarch64/Gis_signal_frame.c
-    ${_unwind_src}/src/aarch64/Gregs.c
-    ${_unwind_src}/src/aarch64/Gresume.c
-    ${_unwind_src}/src/aarch64/Gstash_frame.c
-    ${_unwind_src}/src/aarch64/Gstep.c
-    ${_unwind_src}/src/aarch64/is_fpreg.c
-  )
-  list(APPEND _unwind_ptrace_srcs
-    ${_unwind_src}/src/aarch64/Ginit_remote.c
-  )
-elseif(CMAKE_SYSTEM_PROCESSOR STREQUAL "arm")
-  set(_unwind_cpu "arm")
-  list(APPEND _unwind_platform_srcs
-    ${_unwind_src}/src/arm/Gcreate_addr_space.c
-    ${_unwind_src}/src/arm/Gex_tables.c
-    ${_unwind_src}/src/arm/Gglobal.c
-    ${_unwind_src}/src/arm/Ginit.c
-    ${_unwind_src}/src/arm/Gis_signal_frame.c
-    ${_unwind_src}/src/arm/Gregs.c
-    ${_unwind_src}/src/arm/Gresume.c
-    ${_unwind_src}/src/arm/Gstash_frame.c
-    ${_unwind_src}/src/arm/Gstep.c
-    ${_unwind_src}/src/arm/is_fpreg.c
-  )
-  list(APPEND _unwind_ptrace_srcs
-    ${_unwind_src}/src/arm/Ginit_remote.c
-  )
-endif()
-
-add_library(unwind_ptrace_wrapped STATIC
-  # internal_headers
-  ${_unwind_src}/include/compiler.h
-  ${_unwind_src}/include/config.h
-  ${_unwind_src}/include/dwarf.h
-  ${_unwind_src}/include/dwarf-eh.h
-  ${_unwind_src}/include/dwarf_i.h
-  ${_unwind_src}/include/libunwind.h
-  ${_unwind_src}/include/libunwind-common.h
-  ${_unwind_src}/include/libunwind-coredump.h
-  ${_unwind_src}/include/libunwind-dynamic.h
-  ${_unwind_src}/include/libunwind-ptrace.h
-  ${_unwind_src}/include/libunwind-x86_64.h
-  ${_unwind_src}/include/libunwind_i.h
-  ${_unwind_src}/include/mempool.h
-  ${_unwind_src}/include/remote.h
-  ${_unwind_src}/include/tdep-x86_64/dwarf-config.h
-  ${_unwind_src}/include/tdep-x86_64/libunwind_i.h
-  ${_unwind_src}/include/tdep/dwarf-config.h
-  ${_unwind_src}/include/tdep/libunwind_i.h
-  ${_unwind_src}/include/unwind.h
-  ${_unwind_src}/src/elf32.h
-  ${_unwind_src}/src/elf64.h
-  ${_unwind_src}/src/elfxx.h
-  ${_unwind_src}/src/os-linux.h
-  ${_unwind_src}/src/x86_64/init.h
-  ${_unwind_src}/src/x86_64/offsets.h
-  ${_unwind_src}/src/x86_64/ucontext_i.h
-  ${_unwind_src}/src/x86_64/unwind_i.h
-  # included_sources
-  ${_unwind_src}/src/elf64.h
-  ${_unwind_src}/src/elfxx.h
-  ${_unwind_src}/src/elfxx.c
-  # sources_common
-  ${_unwind_src}/src/dwarf/Gexpr.c
-  ${_unwind_src}/src/dwarf/Gfde.c
-  ${_unwind_src}/src/dwarf/Gfind_proc_info-lsb.c
-  ${_unwind_src}/src/dwarf/Gfind_unwind_table.c
-  ${_unwind_src}/src/dwarf/Gparser.c
-  ${_unwind_src}/src/dwarf/Gpe.c
-  ${_unwind_src}/src/dwarf/Gstep.c
-  ${_unwind_src}/src/dwarf/global.c
-  ${_unwind_src}/src/mi/Gdestroy_addr_space.c
-  ${_unwind_src}/src/mi/Gdyn-extract.c
-  ${_unwind_src}/src/mi/Gfind_dynamic_proc_info.c
-  ${_unwind_src}/src/mi/Gget_accessors.c
-  ${_unwind_src}/src/mi/Gget_proc_name.c
-  ${_unwind_src}/src/mi/Gget_reg.c
-  ${_unwind_src}/src/mi/Gput_dynamic_unwind_info.c
-  ${_unwind_src}/src/mi/flush_cache.c
-  ${_unwind_src}/src/mi/init.c
-  ${_unwind_src}/src/mi/mempool.c
-  ${_unwind_src}/src/os-linux.c
-  ${_unwind_platform_srcs}
-  # srcs
-  ${_unwind_src}/src/mi/Gdyn-remote.c
-  ${_unwind_src}/src/ptrace/_UPT_access_fpreg.c
-  ${_unwind_src}/src/ptrace/_UPT_access_mem.c
-  ${_unwind_src}/src/ptrace/_UPT_access_reg.c
-  ${_unwind_src}/src/ptrace/_UPT_accessors.c
-  ${_unwind_src}/src/ptrace/_UPT_create.c
-  ${_unwind_src}/src/ptrace/_UPT_destroy.c
-  ${_unwind_src}/src/ptrace/_UPT_elf.c
-  ${_unwind_src}/src/ptrace/_UPT_find_proc_info.c
-  ${_unwind_src}/src/ptrace/_UPT_get_dyn_info_list_addr.c
-  ${_unwind_src}/src/ptrace/_UPT_get_proc_name.c
-  ${_unwind_src}/src/ptrace/_UPT_internal.h
-  ${_unwind_src}/src/ptrace/_UPT_put_unwind_info.c
-  ${_unwind_src}/src/ptrace/_UPT_reg_offset.c
-  ${_unwind_src}/src/ptrace/_UPT_resume.c
-  # hdrs
-  ${_unwind_src}/include/config.h
-  ${_unwind_src}/include/libunwind.h
-  # source_ptrace
-  ${_unwind_ptrace_srcs}
-)
-add_library(unwind::unwind_ptrace_wrapped ALIAS unwind_ptrace_wrapped)
-target_include_directories(unwind_ptrace_wrapped PUBLIC
-  ${_unwind_src}/include
-  ${_unwind_src}/include/tdep
-  ${_unwind_src}/include/tdep-${_unwind_cpu}
-  ${_unwind_src}/src
-)
-target_compile_options(unwind_ptrace_wrapped PRIVATE
-  -fno-common
-  -Wno-cpp
-)
-target_compile_definitions(unwind_ptrace_wrapped
-  PRIVATE -DHAVE_CONFIG_H
-          -D_GNU_SOURCE
-          -DNO_FRAME_POINTER
-  PUBLIC -D_UPT_accessors=_UPT_accessors_wrapped
-         -D_UPT_create=_UPT_create_wrapped
-         -D_UPT_destroy=_UPT_destroy_wrapped
-
-         -D_U${_unwind_cpu}_create_addr_space=_U${_unwind_cpu}_create_addr_space_wrapped
-         -D_U${_unwind_cpu}_destroy_addr_space=_U${_unwind_cpu}_destroy_addr_space_wrapped
-         -D_U${_unwind_cpu}_get_proc_name=_U${_unwind_cpu}_get_proc_name_wrapped
-         -D_U${_unwind_cpu}_get_reg=_U${_unwind_cpu}_get_reg_wrapped
-         -D_U${_unwind_cpu}_init_remote=_U${_unwind_cpu}_init_remote_wrapped
-         -D_U${_unwind_cpu}_step=_U${_unwind_cpu}_step_wrapped
-
-         -Dptrace=ptrace_wrapped
-)
-target_link_libraries(unwind_ptrace_wrapped PRIVATE
-  sapi::base
-  sandbox2::ptrace_hook
-)
diff --git a/cmake/protobuf/CMakeLists.txt.in b/cmake/protobuf/CMakeLists.txt.in
deleted file mode 100644
index 7640f2d..0000000
--- a/cmake/protobuf/CMakeLists.txt.in
+++ /dev/null
@@ -1,28 +0,0 @@
-# Copyright 2019 Google LLC
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-cmake_minimum_required(VERSION 3.12)
-project(protobuf-download NONE)
-
-include(ExternalProject)
-ExternalProject_Add(protobuf
-  GIT_REPOSITORY    https://github.com/protocolbuffers/protobuf.git
-  GIT_TAG           v3.11.4  # 2020-02-14
-  SOURCE_DIR        "${CMAKE_BINARY_DIR}/protobuf-src"
-  BINARY_DIR        "${CMAKE_BINARY_DIR}/protobuf-build"
-  CONFIGURE_COMMAND ""
-  BUILD_COMMAND     ""
-  INSTALL_COMMAND   ""
-  TEST_COMMAND      ""
-)
diff --git a/cmake/protobuf/Download.cmake b/cmake/protobuf/Download.cmake
deleted file mode 100644
index 8dc3432..0000000
--- a/cmake/protobuf/Download.cmake
+++ /dev/null
@@ -1,42 +0,0 @@
-# Copyright 2019 Google LLC
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-# Downloads and unpacks Protobuf at configure time
-
-set(workdir "${CMAKE_BINARY_DIR}/protobuf-download")
-
-configure_file("${CMAKE_CURRENT_LIST_DIR}/CMakeLists.txt.in"
-               "${workdir}/CMakeLists.txt")
-execute_process(COMMAND ${CMAKE_COMMAND} -G "${CMAKE_GENERATOR}" .
-                RESULT_VARIABLE error
-                WORKING_DIRECTORY "${workdir}")
-if(error)
-  message(FATAL_ERROR "CMake step for ${PROJECT_NAME} failed: ${error}")
-endif()
-
-execute_process(COMMAND ${CMAKE_COMMAND} --build .
-                RESULT_VARIABLE error
-                WORKING_DIRECTORY "${workdir}")
-if(error)
-  message(FATAL_ERROR "Build step for ${PROJECT_NAME} failed: ${error}")
-endif()
-
-set(protobuf_BUILD_TESTS OFF CACHE BOOL "")
-set(protobuf_BUILD_SHARED_LIBS OFF CACHE BOOL "")
-set(protobuf_WITH_ZLIB OFF CACHE BOOL "")
-
-add_subdirectory("${CMAKE_BINARY_DIR}/protobuf-src/cmake"
-                 "${CMAKE_BINARY_DIR}/protobuf-build" EXCLUDE_FROM_ALL)
-get_property(Protobuf_INCLUDE_DIRS TARGET protobuf::libprotobuf
-                                   PROPERTY INCLUDE_DIRECTORIES)
diff --git a/cmake/zlib/CMakeLists.txt.in b/cmake/zlib/CMakeLists.txt.in
deleted file mode 100644
index 016e83f..0000000
--- a/cmake/zlib/CMakeLists.txt.in
+++ /dev/null
@@ -1,30 +0,0 @@
-# Copyright 2020 Google LLC
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-cmake_minimum_required(VERSION 3.12)
-project(zlib-download NONE)
-
-include(ExternalProject)
-ExternalProject_Add(zlib
-  URL https://mirror.bazel.build/zlib.net/zlib-1.2.11.tar.gz
-  URL_HASH SHA256=c3e5e9fdd5004dcb542feda5ee4f0ff0744628baf8ed2dd5d66f8ca1197cb1a1  # 2020-04-23
-  SOURCE_DIR        "${CMAKE_BINARY_DIR}/zlib-src"
-  PATCH_COMMAND     patch -p1
-                    < "@SAPI_SOURCE_DIR@/sandboxed_api/bazel/external/zlib.patch"
-  CONFIGURE_COMMAND ""
-  BUILD_COMMAND     ""
-  INSTALL_COMMAND   ""
-  TEST_COMMAND      ""
-  BUILD_IN_SOURCE TRUE
-)
diff --git a/cmake/zlib/Download.cmake b/cmake/zlib/Download.cmake
deleted file mode 100644
index 24aad46..0000000
--- a/cmake/zlib/Download.cmake
+++ /dev/null
@@ -1,78 +0,0 @@
-# Copyright 2020 Google LLC
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-# Downloads and unpacks Abseil at configure time
-
-set(workdir "${CMAKE_BINARY_DIR}/zlib-download")
-
-configure_file("${CMAKE_CURRENT_LIST_DIR}/CMakeLists.txt.in"
-               "${workdir}/CMakeLists.txt")
-execute_process(COMMAND ${CMAKE_COMMAND} -G "${CMAKE_GENERATOR}" .
-                RESULT_VARIABLE error
-                WORKING_DIRECTORY "${workdir}")
-if(error)
-  message(FATAL_ERROR "CMake step for ${PROJECT_NAME} failed: ${error}")
-endif()
-
-execute_process(COMMAND ${CMAKE_COMMAND} --build .
-                RESULT_VARIABLE error
-                WORKING_DIRECTORY "${workdir}")
-if(error)
-  message(FATAL_ERROR "Build step for ${PROJECT_NAME} failed: ${error}")
-endif()
-
-set(_zlib_src "${CMAKE_BINARY_DIR}/zlib-src")
-
-set(ZLIB_FOUND TRUE)
-set(ZLIB_INCLUDE_DIRS ${_zlib_src})
-
-add_library(z STATIC
-  ${_zlib_src}/adler32.c
-  ${_zlib_src}/compress.c
-  ${_zlib_src}/crc32.c
-  ${_zlib_src}/crc32.h
-  ${_zlib_src}/deflate.c
-  ${_zlib_src}/deflate.h
-  ${_zlib_src}/gzclose.c
-  ${_zlib_src}/gzguts.h
-  ${_zlib_src}/gzlib.c
-  ${_zlib_src}/gzread.c
-  ${_zlib_src}/gzwrite.c
-  ${_zlib_src}/infback.c
-  ${_zlib_src}/inffast.c
-  ${_zlib_src}/inffast.h
-  ${_zlib_src}/inffixed.h
-  ${_zlib_src}/inflate.c
-  ${_zlib_src}/inflate.h
-  ${_zlib_src}/inftrees.c
-  ${_zlib_src}/inftrees.h
-  ${_zlib_src}/trees.c
-  ${_zlib_src}/trees.h
-  ${_zlib_src}/uncompr.c
-  ${_zlib_src}/zconf.h
-  ${_zlib_src}/zlib.h
-  ${_zlib_src}/zutil.c
-  ${_zlib_src}/zutil.h
-)
-add_library(ZLIB::ZLIB ALIAS z)
-target_include_directories(z PUBLIC
-  ${_zlib_src}
-)
-target_compile_options(z PRIVATE
-  -w
-  -Dverbose=-1
-)
-target_link_libraries(z PRIVATE
-  sapi::base
-)