diff --git a/scripts/Makefile b/scripts/Makefile
index ada1344..39c53c3 100644
--- a/scripts/Makefile
+++ b/scripts/Makefile
@@ -21,7 +21,7 @@ cpplint-all \
 check-badchars
 
 $(BUILD_DIR):
-	mkdir -p $(BUILD_DIR)
+	@mkdir -p $(BUILD_DIR)
 
 #### clean: remove all files generated by the productive rules
 .PHONY: clean
@@ -54,28 +54,28 @@ show-diff: nodejs/node_modules/remark nodejs/remark/.remarkrc $(SOURCEPATH) $(BU
 .PHONY: check-references
 check-references: $(SOURCEPATH) $(BUILD_DIR) Makefile
 ## check references unique
-	rm -f $(BUILD_DIR)/$(SOURCEFILE).uniq
-	grep -oP '(?<=<a name=")[^\"]+' $(SOURCEPATH) | uniq -d > $(BUILD_DIR)/$(SOURCEFILE).uniq
+	@rm -f $(BUILD_DIR)/$(SOURCEFILE).uniq
+	@grep -oP '(?<=<a name=")[^\"]+' $(SOURCEPATH) | uniq -d > $(BUILD_DIR)/$(SOURCEFILE).uniq
 ## check if output has data
-	if [ -s "build/CppCoreGuidelines.md.uniq" ]; then echo 'Found duplicate anchors:'; cat $(BUILD_DIR)/$(SOURCEFILE).uniq; false; fi
+	@if [ -s "build/CppCoreGuidelines.md.uniq" ]; then echo 'Found duplicate anchors:'; cat $(BUILD_DIR)/$(SOURCEFILE).uniq; false; fi
 
 .PHONY: check-notabs
 check-notabs: $(SOURCEPATH) $(BUILD_DIR) Makefile
 # find lines with tabs
 # old file still might be around
-	rm -f $(BUILD_DIR)/CppCoreGuidelines.md.tabs
+	@rm -f $(BUILD_DIR)/CppCoreGuidelines.md.tabs
 # print file, add line numbers, remove tabs from nl tool, grep for remaining tabs, replace with stars
-	cat ../CppCoreGuidelines.md | nl -ba | sed -s 's/\(^[^\t]*\)\t/\1--/g' | grep -P '\t' | sed -s 's/\t/\*\*\*\*/g' > $(BUILD_DIR)/CppCoreGuidelines.md.tabs
-	if [ -s $(BUILD_DIR)/CppCoreGuidelines.md.tabs ]; then echo 'Warning: Tabs found:'; cat $(BUILD_DIR)/CppCoreGuidelines.md.tabs; false; fi;
+	@cat ../CppCoreGuidelines.md | nl -ba | sed -s 's/\(^[^\t]*\)\t/\1--/g' | grep -P '\t' | sed -s 's/\t/\*\*\*\*/g' > $(BUILD_DIR)/CppCoreGuidelines.md.tabs
+	@if [ -s $(BUILD_DIR)/CppCoreGuidelines.md.tabs ]; then echo 'Warning: Tabs found:'; cat $(BUILD_DIR)/CppCoreGuidelines.md.tabs; false; fi;
 
 .PHONY: check-badchars
 check-badchars: $(SOURCEPATH) $(BUILD_DIR) Makefile
 # find lines with tabs
 # old file still might be around
-	rm -f $(BUILD_DIR)/CppCoreGuidelines.md.badchars
+	@rm -f $(BUILD_DIR)/CppCoreGuidelines.md.badchars
 # print file, add line numbers, grep for bad chars
-	cat ../CppCoreGuidelines.md | nl -ba | grep -P '’|‘|”|“|¸|–|…|¦' > $(BUILD_DIR)/CppCoreGuidelines.md.badchars || true
-	if [ -s $(BUILD_DIR)/CppCoreGuidelines.md.badchars ]; then echo 'Warning: Undesired chars (–’‘“”¸…¦) found, use straight quotes instead:'; cat $(BUILD_DIR)/CppCoreGuidelines.md.badchars; false; fi;
+	@cat ../CppCoreGuidelines.md | nl -ba | grep -P '’|‘|”|“|¸|–|…|¦' > $(BUILD_DIR)/CppCoreGuidelines.md.badchars || true
+	@if [ -s $(BUILD_DIR)/CppCoreGuidelines.md.badchars ]; then echo 'Warning: Undesired chars (–’‘“”¸…¦) found, use straight quotes instead:'; cat $(BUILD_DIR)/CppCoreGuidelines.md.badchars; false; fi;
 
 
 
@@ -88,7 +88,7 @@ cpplint-all: $(BUILD_DIR)/codeblocks $(BUILD_DIR)/Makefile python/Makefile.in
 #### generic makefile for sourceblocks (need to be evaluated after c++ file generation)
 
 $(BUILD_DIR)/Makefile: python/Makefile.in
-	cp python/Makefile.in $(BUILD_DIR)/codeblocks/Makefile
+	@cp python/Makefile.in $(BUILD_DIR)/codeblocks/Makefile
 
 #### split md file into plain text and code
 
@@ -98,7 +98,7 @@ $(BUILD_DIR)/plain.txt: splitfile
 
 .PHONY: splitfile
 splitfile: $(SOURCEPATH) ./python/md-split.py
-	python ./python/md-split.py $(SOURCEPATH) $(BUILD_DIR)/plain.txt $(BUILD_DIR)/codeblocks
+	@python ./python/md-split.py $(SOURCEPATH) $(BUILD_DIR)/plain.txt $(BUILD_DIR)/codeblocks
 
 #### install npm modules
 # install/update npm dependencies defined in file package.json