diff --git a/CMakeLists.txt b/CMakeLists.txt
index 862e7bd3..3be4afb9 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -116,7 +116,7 @@ option(BUILD_MISC_TESTS "Build additional tests and utilities" OFF)
 option(BUILD_FUN_UTILS "Build additional just for fun utilities" OFF)
 
 option(AUTOTEST "Enable autotests (mainly for CI)" OFF)
-if (AUTOTEST)
+if(AUTOTEST)
   option(NON_HERMETIC_TESTS "Whether to build and run tests that depend on an internet connection" OFF)
   option(PROXY_TEST "Enable proxy test (needs HTTP/SOCKS5 proxy on port 8080/8081)" OFF)
 endif()
@@ -307,7 +307,10 @@ set(toxcore_SOURCES
   toxcore/tox_unpack.h
   toxcore/util.c
   toxcore/util.h)
-set(toxcore_LINK_MODULES ${toxcore_LINK_MODULES} ${LIBSODIUM_LIBRARIES})
+set(toxcore_LINK_LIBRARIES ${toxcore_LINK_LIBRARIES} ${LIBSODIUM_LIBRARIES})
+set(toxcore_LINK_DIRECTORIES ${toxcore_LINK_DIRECTORIES} ${LIBSODIUM_LIBRARY_DIRS})
+set(toxcore_INCLUDE_DIRECTORIES ${toxcore_INCLUDE_DIRECTORIES} ${LIBSODIUM_INCLUDE_DIRS})
+set(toxcore_COMPILE_OPTIONS ${toxcore_COMPILE_OPTIONS} ${LIBSODIUM_CFLAGS_OTHER})
 set(toxcore_PKGCONFIG_REQUIRES ${toxcore_PKGCONFIG_REQUIRES} libsodium)
 set(toxcore_API_HEADERS
   ${toxcore_SOURCE_DIR}/toxcore/tox.h^tox
@@ -343,7 +346,10 @@ if(BUILD_TOXAV)
   set(toxcore_API_HEADERS ${toxcore_API_HEADERS}
     ${toxcore_SOURCE_DIR}/toxav/toxav.h^toxav)
 
-  set(toxcore_LINK_MODULES ${toxcore_LINK_MODULES} ${OPUS_LIBRARIES} ${VPX_LIBRARIES})
+  set(toxcore_LINK_LIBRARIES ${toxcore_LINK_LIBRARIES} ${OPUS_LIBRARIES} ${VPX_LIBRARIES})
+  set(toxcore_LINK_DIRECTORIES ${toxcore_LINK_DIRECTORIES} ${OPUS_LIBRARY_DIRS} ${VPX_LIBRARY_DIRS})
+  set(toxcore_INCLUDE_DIRECTORIES ${toxcore_INCLUDE_DIRECTORIES} ${OPUS_INCLUDE_DIRS} ${VPX_INCLUDE_DIRS})
+  set(toxcore_COMPILE_OPTIONS ${toxcore_COMPILE_OPTIONS} ${OPUS_CFLAGS_OTHER} ${VPX_CFLAGS_OTHER})
   set(toxcore_PKGCONFIG_REQUIRES ${toxcore_PKGCONFIG_REQUIRES} opus vpx)
 endif()
 
@@ -370,28 +376,28 @@ set(toxcore_API_HEADERS ${toxcore_API_HEADERS}
 # any potential libvpx linking.
 message("CMAKE_THREAD_LIBS_INIT: ${CMAKE_THREAD_LIBS_INIT}")
 if(CMAKE_THREAD_LIBS_INIT)
-  set(toxcore_LINK_MODULES ${toxcore_LINK_MODULES} ${CMAKE_THREAD_LIBS_INIT})
+  set(toxcore_LINK_LIBRARIES ${toxcore_LINK_LIBRARIES} ${CMAKE_THREAD_LIBS_INIT})
   set(toxcore_PKGCONFIG_LIBS ${toxcore_PKGCONFIG_LIBS} ${CMAKE_THREAD_LIBS_INIT})
 endif()
 
 
 if(NSL_LIBRARIES)
-  set(toxcore_LINK_MODULES ${toxcore_LINK_MODULES} ${NSL_LIBRARIES})
+  set(toxcore_LINK_LIBRARIES ${toxcore_LINK_LIBRARIES} ${NSL_LIBRARIES})
   set(toxcore_PKGCONFIG_LIBS ${toxcore_PKGCONFIG_LIBS} -lnsl)
 endif()
 
 if(RT_LIBRARIES)
-  set(toxcore_LINK_MODULES ${toxcore_LINK_MODULES} ${RT_LIBRARIES})
+  set(toxcore_LINK_LIBRARIES ${toxcore_LINK_LIBRARIES} ${RT_LIBRARIES})
   set(toxcore_PKGCONFIG_LIBS ${toxcore_PKGCONFIG_LIBS} -lrt)
 endif()
 
 if(SOCKET_LIBRARIES)
-  set(toxcore_LINK_MODULES ${toxcore_LINK_MODULES} ${SOCKET_LIBRARIES})
+  set(toxcore_LINK_LIBRARIES ${toxcore_LINK_LIBRARIES} ${SOCKET_LIBRARIES})
   set(toxcore_PKGCONFIG_LIBS ${toxcore_PKGCONFIG_LIBS} -lsocket)
 endif()
 
 if(WIN32)
-  set(toxcore_LINK_MODULES ${toxcore_LINK_MODULES} ws2_32 iphlpapi)
+  set(toxcore_LINK_LIBRARIES ${toxcore_LINK_LIBRARIES} ws2_32 iphlpapi)
   set(toxcore_PKGCONFIG_LIBS ${toxcore_PKGCONFIG_LIBS} -lws2_32 -liphlpapi)
 endif()
 
@@ -406,10 +412,16 @@ add_module(toxcore ${toxcore_SOURCES})
 
 # Link it to all dependencies.
 if(TARGET toxcore_static)
-  target_link_libraries(toxcore_static PRIVATE ${toxcore_LINK_MODULES})
+  target_link_libraries(toxcore_static PRIVATE ${toxcore_LINK_LIBRARIES})
+  target_link_directories(toxcore_static PUBLIC ${toxcore_LINK_DIRECTORIES})
+  target_include_directories(toxcore_static SYSTEM PRIVATE ${toxcore_INCLUDE_DIRECTORIES})
+  target_compile_options(toxcore_static PRIVATE ${toxcore_COMPILE_OPTIONS})
 endif()
 if(TARGET toxcore_shared)
-  target_link_libraries(toxcore_shared PRIVATE ${toxcore_LINK_MODULES})
+  target_link_libraries(toxcore_shared PRIVATE ${toxcore_LINK_LIBRARIES})
+  target_link_directories(toxcore_shared PUBLIC ${toxcore_LINK_DIRECTORIES})
+  target_include_directories(toxcore_shared SYSTEM PRIVATE ${toxcore_INCLUDE_DIRECTORIES})
+  target_compile_options(toxcore_shared PRIVATE ${toxcore_COMPILE_OPTIONS})
 endif()
 
 # Make version script (on systems that support it) to limit symbol visibility.
diff --git a/auto_tests/CMakeLists.txt b/auto_tests/CMakeLists.txt
index 287b06bb..ffdf8055 100644
--- a/auto_tests/CMakeLists.txt
+++ b/auto_tests/CMakeLists.txt
@@ -11,20 +11,18 @@ else()
 endif()
 
 function(auto_test target)
-  if(AUTOTEST AND NOT (MSVC AND ARGV1 STREQUAL "MSVC_DONT_BUILD"))
-    add_executable(auto_${target}_test ${target}_test.c)
-    target_link_libraries(auto_${target}_test PRIVATE misc_tools auto_test_support)
-    if(TARGET toxcore_static)
-      target_link_libraries(auto_${target}_test PRIVATE toxcore_static)
-    else()
-      target_link_libraries(auto_${target}_test PRIVATE toxcore_shared)
-    endif()
-    if(NOT ARGV1 STREQUAL "DONT_RUN")
-      add_test(NAME ${target} COMMAND ${CROSSCOMPILING_EMULATOR} auto_${target}_test)
-      set_tests_properties(${target} PROPERTIES TIMEOUT "${TEST_TIMEOUT_SECONDS}")
-      # add the source dir as environment variable, so the testdata can be found
-      set_tests_properties(${target} PROPERTIES ENVIRONMENT "LLVM_PROFILE_FILE=${target}.profraw;srcdir=${CMAKE_CURRENT_SOURCE_DIR}")
-    endif()
+  add_executable(auto_${target}_test ${target}_test.c)
+  target_link_libraries(auto_${target}_test PRIVATE misc_tools auto_test_support)
+  if(TARGET toxcore_static)
+    target_link_libraries(auto_${target}_test PRIVATE toxcore_static)
+  else()
+    target_link_libraries(auto_${target}_test PRIVATE toxcore_shared)
+  endif()
+  if(NOT ARGV1 STREQUAL "DONT_RUN")
+    add_test(NAME ${target} COMMAND ${CROSSCOMPILING_EMULATOR} auto_${target}_test)
+    set_tests_properties(${target} PROPERTIES TIMEOUT "${TEST_TIMEOUT_SECONDS}")
+    # add the source dir as environment variable, so the testdata can be found
+    set_tests_properties(${target} PROPERTIES ENVIRONMENT "LLVM_PROFILE_FILE=${target}.profraw;srcdir=${CMAKE_CURRENT_SOURCE_DIR}")
   endif()
 endfunction()
 
@@ -79,17 +77,28 @@ auto_test(typing)
 auto_test(version)
 auto_test(save_compatibility)
 
+target_include_directories(auto_encryptsave_test SYSTEM PRIVATE ${LIBSODIUM_INCLUDE_DIRS})
+
 if(NON_HERMETIC_TESTS)
   auto_test(bootstrap)
   auto_test(tcp_relay)
 endif()
 
 if(BUILD_TOXAV)
-  auto_test(conference_av MSVC_DONT_BUILD)
+  auto_test(conference_av)
   auto_test(toxav_basic)
   auto_test(toxav_many)
-endif()
 
+  target_link_libraries(auto_toxav_basic_test PRIVATE ${VPX_LIBRARIES})
+  target_link_directories(auto_toxav_basic_test PRIVATE ${VPX_LIBRARY_DIRS})
+  target_include_directories(auto_toxav_basic_test SYSTEM PRIVATE ${VPX_INCLUDE_DIRS})
+  target_compile_options(auto_toxav_basic_test PRIVATE ${VPX_CFLAGS_OTHER})
+
+  target_link_libraries(auto_toxav_many_test PRIVATE ${VPX_LIBRARIES})
+  target_link_directories(auto_toxav_many_test PRIVATE ${VPX_LIBRARY_DIRS})
+  target_include_directories(auto_toxav_many_test SYSTEM PRIVATE ${VPX_INCLUDE_DIRS})
+  target_compile_options(auto_toxav_many_test PRIVATE ${VPX_CFLAGS_OTHER})
+endif()
 
 if(PROXY_TEST)
   auto_test(proxy)
diff --git a/cmake/Dependencies.cmake b/cmake/Dependencies.cmake
index fb49944e..6f2ec906 100644
--- a/cmake/Dependencies.cmake
+++ b/cmake/Dependencies.cmake
@@ -8,19 +8,25 @@ include(ModulePackage)
 
 find_package(Threads REQUIRED)
 
-find_library(NSL_LIBRARIES          nsl          )
-find_library(RT_LIBRARIES           rt           )
-find_library(SOCKET_LIBRARIES       socket       )
+find_library(NSL_LIBRARIES    nsl   )
+find_library(RT_LIBRARIES     rt    )
+find_library(SOCKET_LIBRARIES socket)
 
 # For toxcore.
-pkg_use_module(LIBSODIUM            libsodium    )
+pkg_search_module(LIBSODIUM   libsodium IMPORTED_TARGET)
 
 # For toxav.
-pkg_use_module(OPUS                 "opus;Opus"  )
-pkg_use_module(VPX                  "vpx;libvpx" )
+pkg_search_module(OPUS        opus      IMPORTED_TARGET)
+if(NOT OPUS_FOUND)
+  pkg_search_module(OPUS      Opus      IMPORTED_TARGET)
+endif()
+pkg_search_module(VPX         vpx       IMPORTED_TARGET)
+if(NOT VPX_FOUND)
+  pkg_search_module(VPX       libvpx    IMPORTED_TARGET)
+endif()
 
 # For tox-bootstrapd.
-pkg_use_module(LIBCONFIG            libconfig    )
+pkg_search_module(LIBCONFIG   libconfig IMPORTED_TARGET)
 
 ###############################################################################
 #
diff --git a/cmake/ModulePackage.cmake b/cmake/ModulePackage.cmake
index 61f7228f..cbc62f41 100644
--- a/cmake/ModulePackage.cmake
+++ b/cmake/ModulePackage.cmake
@@ -21,41 +21,6 @@ endif()
 
 find_package(PkgConfig)
 
-function(pkg_use_module mod pkgs)
-  foreach(pkg IN ITEMS ${pkgs})
-    if(PKG_CONFIG_FOUND)
-      pkg_search_module(${mod} ${pkg} IMPORTED_TARGET)
-    endif()
-    if(NOT ${mod}_FOUND)
-      find_package(${pkg} QUIET)
-      # This is very very ugly, but the variables are sometimes used in this scope
-      # and sometimes in the parent scope, so we have to set them to both places.
-      set(${mod}_FOUND ${${pkg}_FOUND})
-      set(${mod}_FOUND ${${pkg}_FOUND} PARENT_SCOPE)
-      set(${mod}_LIBRARIES ${${pkg}_LIBS})
-      set(${mod}_LIBRARIES ${${pkg}_LIBS} PARENT_SCOPE)
-      set(${mod}_LIBRARY_DIRS ${${pkg}_LIBRARY_DIRS})
-      set(${mod}_LIBRARY_DIRS ${${pkg}_LIBRARY_DIRS} PARENT_SCOPE)
-      set(${mod}_INCLUDE_DIRS ${${pkg}_INCLUDE_DIRS})
-      set(${mod}_INCLUDE_DIRS ${${pkg}_INCLUDE_DIRS} PARENT_SCOPE)
-    endif()
-    if(${mod}_FOUND)
-      link_directories(${${mod}_LIBRARY_DIRS})
-      include_directories(${${mod}_INCLUDE_DIRS})
-      set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${${mod}_CFLAGS_OTHER}" PARENT_SCOPE)
-      set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${${mod}_CFLAGS_OTHER}" PARENT_SCOPE)
-
-      if(NOT MSVC)
-        foreach(dir ${${mod}_INCLUDE_DIRS})
-          set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -isystem ${dir}" PARENT_SCOPE)
-          set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -isystem ${dir}" PARENT_SCOPE)
-        endforeach()
-      endif()
-      break()
-    endif()
-  endforeach()
-endfunction()
-
 function(add_module lib)
   set(${lib}_SOURCES ${ARGN} PARENT_SCOPE)
 
diff --git a/other/bootstrap_daemon/CMakeLists.txt b/other/bootstrap_daemon/CMakeLists.txt
index 260c72d2..52d8c5d6 100644
--- a/other/bootstrap_daemon/CMakeLists.txt
+++ b/other/bootstrap_daemon/CMakeLists.txt
@@ -20,6 +20,9 @@ add_executable(tox-bootstrapd
   ../bootstrap_node_packets.c
   ../bootstrap_node_packets.h)
 target_link_libraries(tox-bootstrapd PRIVATE ${LIBCONFIG_LIBRARIES})
+target_link_directories(tox-bootstrapd PRIVATE ${LIBCONFIG_LIBRARY_DIRS})
+target_include_directories(tox-bootstrapd SYSTEM PRIVATE ${LIBCONFIG_INCLUDE_DIRS})
+target_compile_options(tox-bootstrapd PRIVATE ${LIBCONFIG_CFLAGS_OTHER})
 if(TARGET toxcore_static)
   target_link_libraries(tox-bootstrapd PRIVATE toxcore_static)
 else()
diff --git a/other/docker/coverage/Dockerfile b/other/docker/coverage/Dockerfile
index 51504b8d..56f88064 100644
--- a/other/docker/coverage/Dockerfile
+++ b/other/docker/coverage/Dockerfile
@@ -64,12 +64,12 @@ RUN /work/other/proxy/proxy_server \
 
 WORKDIR /work/mallocfail
 RUN ["git", "clone", "--depth=1", "https://github.com/ralight/mallocfail", "/work/mallocfail"]
-COPY syscall_funcs.c src/
+COPY other/docker/coverage/syscall_funcs.c src/
 RUN gcc -fPIC -shared -O2 -g3 -Wall -Ideps/uthash -Ideps/sha3 deps/*/*.c src/*.c -o mallocfail.so -ldl -lbacktrace \
  && install mallocfail.so /usr/local/lib/mallocfail.so
 
 WORKDIR /work/_build
-COPY run_mallocfail /usr/local/bin/
+COPY other/docker/coverage/run_mallocfail /usr/local/bin/
 RUN ["run_mallocfail", "--ctest=2", "--jobs=8"]
 RUN ["gcovr", \
  "--sort-percentage", \
diff --git a/other/docker/coverage/run b/other/docker/coverage/run
index d501252b..368d8429 100755
--- a/other/docker/coverage/run
+++ b/other/docker/coverage/run
@@ -5,5 +5,5 @@ set -eux
 read -a ci_env <<<"$(bash <(curl -s https://codecov.io/env))"
 
 docker build -t toxchat/c-toxcore:sources -f other/docker/sources/Dockerfile .
-docker build -t toxchat/c-toxcore:coverage other/docker/coverage
+docker build -t toxchat/c-toxcore:coverage -f other/docker/coverage/Dockerfile .
 docker run "${ci_env[@]}" -e CI=true --name toxcore-coverage --rm -t toxchat/c-toxcore:coverage /usr/local/bin/codecov -x "llvm-cov gcov"
diff --git a/other/docker/coverage/serve b/other/docker/coverage/serve
index 93145338..94a09d15 100755
--- a/other/docker/coverage/serve
+++ b/other/docker/coverage/serve
@@ -3,6 +3,6 @@
 set -eux
 
 docker build -t toxchat/c-toxcore:sources -f other/docker/sources/Dockerfile .
-docker build -t toxchat/c-toxcore:coverage other/docker/coverage
+docker build -t toxchat/c-toxcore:coverage -f other/docker/coverage/Dockerfile .
 docker build -t toxchat/c-toxcore:coverage-nginx -f other/docker/coverage/Dockerfile.nginx other/docker/coverage
 docker run --name toxcore-coverage --rm -it -p "28192:80" toxchat/c-toxcore:coverage-nginx
diff --git a/testing/CMakeLists.txt b/testing/CMakeLists.txt
index 3ca9f88e..82f228bf 100644
--- a/testing/CMakeLists.txt
+++ b/testing/CMakeLists.txt
@@ -8,6 +8,10 @@ if(TARGET toxcore_static)
 else()
   target_link_libraries(misc_tools PRIVATE toxcore_shared)
 endif()
+target_link_libraries(misc_tools PRIVATE ${LIBSODIUM_LIBRARIES})
+target_link_directories(misc_tools PUBLIC ${LIBSODIUM_LIBRARY_DIRS})
+target_include_directories(misc_tools SYSTEM PRIVATE ${LIBSODIUM_INCLUDE_DIRS})
+target_compile_options(misc_tools PRIVATE ${LIBSODIUM_CFLAGS_OTHER})
 
 ################################################################################
 #