Move Doc/tools/sphinxext content to Doc/tools, there is no need for the nested subdirectory anymore. 
diff --git a/Doc/Makefile b/Doc/Makefile index fee7fc7..5b5f68a 100644 --- a/Doc/Makefile +++ b/Doc/Makefile 
@@ -8,7 +8,7 @@  SPHINXBUILD = sphinx-build  PAPER =  SOURCES = -DISTVERSION = $(shell $(PYTHON) tools/sphinxext/patchlevel.py) +DISTVERSION = $(shell $(PYTHON) tools/patchlevel.py)    ALLSPHINXOPTS = -b $(BUILDER) -d build/doctrees -D latex_paper_size=$(PAPER) \  $(SPHINXOPTS) . build/$(BUILDER) $(SOURCES) @@ -79,7 +79,7 @@ 	@$(MAKE) build BUILDER=$(BUILDER) || { \ 	echo "Suspicious check complete; look for any errors in the above output" \  "or in build/$(BUILDER)/suspicious.csv. If all issues are false" \ - "positives, append that file to tools/sphinxext/susp-ignored.csv."; \ + "positives, append that file to tools/susp-ignored.csv."; \ 	false; }    coverage: BUILDER = coverage