diff --git a/.hgignore b/.hgignore
index 29c3654..2bf58da 100644
--- a/.hgignore
+++ b/.hgignore
@@ -1,2 +1,6 @@
 .*\.pyc$
 build
+.hypothesis
+.pytest_cache
+.vscode
+
diff --git a/Makefile b/Makefile
index 53df26b..3451a37 100644
--- a/Makefile
+++ b/Makefile
@@ -7,7 +7,7 @@ VERSION = 0.1.0
 
 
 clean:
-	$(RM) -r Thun.egg-info/ dist/ $(TESTDIR)
+	$(RM) -r Thun.egg-info/ dist/ build/ __pycache__/ $(TESTDIR)
 	find . -name '*.pyc' | xargs $(RM)
 
 sdist: