diff -urNp old/buildtools/makeman new/buildtools/makeman
--- old/buildtools/makeman	2018-01-03 12:15:55.000000000 +0100
+++ new/buildtools/makeman	2018-02-26 14:18:39.993760106 +0100
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/python3
 #
 # makeman -- compile netpbm's stereotyped HTML to troff markup
 #