diff -rupN --no-dereference harfbuzz-3.1.0/src/gen-def.py harfbuzz-3.1.0-new/src/gen-def.py
--- harfbuzz-3.1.0/src/gen-def.py	2021-11-03 22:37:53.000000000 +0100
+++ harfbuzz-3.1.0-new/src/gen-def.py	2021-11-08 08:39:41.884817013 +0100
@@ -1,4 +1,4 @@
-#!/usr/bin/env python3
+#!/usr/bin/python3
 
 "usage: gen-def.py harfbuzz.def hb.h [hb-blob.h hb-buffer.h ...]"