diff --git a/Makefile.in b/Makefile.in
index ec395ef6a..784054b5a 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -595,6 +595,8 @@ clean mostlyclean distclean maintainer-clean::
 	rm -f *.tex
 	rm -rf examples/*/obj_dir* examples/*/logs
 	rm -rf test_*/obj_dir
+	rm -rf src/*.tidy include/*.tidy examples/*/*.tidy
+	rm -rf .ruff_cache
 	rm -rf nodist/fuzzer/dictionary
 	rm -rf nodist/obj_dir
 	rm -rf verilator.txt
diff --git a/docs/Makefile b/docs/Makefile
index 71b3092eb..a0d42140b 100644
--- a/docs/Makefile
+++ b/docs/Makefile
@@ -77,6 +77,7 @@ help:
 	@$(SPHINXBUILD) -M help "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS)
 
 clean mostlyclean distclean maintainer-clean::
+	rm -rf _build
 	rm -f $(SCRIPTS) *.tmp
 	rm -f *.aux *.cp *.cps *.dvi *.fn *.fns *.ky *.kys *.log
 	rm -f *.pg *.pgs *.toc *.tp *.tps *.vr *.vrs *.idx
diff --git a/test_regress/Makefile b/test_regress/Makefile
index 3f45aa077..4df2bb3df 100644
--- a/test_regress/Makefile
+++ b/test_regress/Makefile
@@ -88,7 +88,7 @@ print-cxx-version:
 maintainer-copy::
 clean mostlyclean distclean maintainer-clean::
 	-rm -rf obj_* simv* simx* csrc cov_work INCA_libs *.log *.key logs vc_hdrs.h
-	-rm -rf t/obj_*
+	-rm -rf t/obj_* t/__pycache__
 
 distclean::
 	-rm -rf snapshot