Manually remove $(BUILT_SOURCES) since no-dist-built-sources doesnt work
diff --git a/test/py.tornado/Makefile.am b/test/py.tornado/Makefile.am
index 3b78793..214ded2 100644
--- a/test/py.tornado/Makefile.am
+++ b/test/py.tornado/Makefile.am
@@ -32,6 +32,9 @@
find . -type d \( -iname "__pycache__" -or -iname "_trial_temp" \) | xargs rm -rf
$(RM) -r gen-py*/
+distdir:
+ $(MAKE) $(AM_MAKEFLAGS) distdir-am
+
dist-hook:
find $(distdir) -type f \( -iname "*.pyc" \) | xargs rm -f
find $(distdir) -type d \( -iname "__pycache__" -or -iname "_trial_temp" \) | xargs rm -rf