diff -rupN harfbuzz-2.0.1/src/gen-def.py harfbuzz-2.0.1-new/src/gen-def.py
--- harfbuzz-2.0.1/src/gen-def.py	2018-10-01 19:49:23.000000000 +0200
+++ harfbuzz-2.0.1-new/src/gen-def.py	2018-10-28 10:43:20.743631488 +0100
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/python3
 
 from __future__ import print_function, division, absolute_import