diff -U4 -r chocolate-doom-3.0.1--orig/configure.ac chocolate-doom-3.0.1--patched/configure.ac
--- chocolate-doom-3.0.1--orig/configure.ac	2020-06-25 05:12:07.000000000 +0200
+++ chocolate-doom-3.0.1--patched/configure.ac	2022-02-01 18:29:02.467062167 +0100
@@ -15,9 +15,9 @@
 orig_CFLAGS="$CFLAGS"
 
 AC_PROG_CC
 AC_PROG_RANLIB
-AC_CHECK_PROG(HAVE_PYTHON, python, true, false)
+AC_CHECK_PROG(HAVE_PYTHON, python3, true, false)
 
 OPT_LEVEL=2
 
 # If this is gcc, we have some options we'd like to turn on.  Turn on 
diff -U4 -r chocolate-doom-3.0.1--orig/data/convert-icon chocolate-doom-3.0.1--patched/data/convert-icon
--- chocolate-doom-3.0.1--orig/data/convert-icon	2020-04-04 21:49:05.000000000 +0200
+++ chocolate-doom-3.0.1--patched/data/convert-icon	2022-02-01 18:32:23.177315007 +0100
@@ -1,5 +1,5 @@
-#!/usr/bin/env python
+#!/usr/bin/python3
 #
 # Copyright(C) 2005-2014 Simon Howard
 #
 # This program is free software; you can redistribute it and/or
diff -U4 -r chocolate-doom-3.0.1--orig/man/docgen chocolate-doom-3.0.1--patched/man/docgen
--- chocolate-doom-3.0.1--orig/man/docgen	2020-06-25 05:10:06.000000000 +0200
+++ chocolate-doom-3.0.1--patched/man/docgen	2022-02-01 18:32:42.741437121 +0100
@@ -1,5 +1,5 @@
-#!/usr/bin/env python
+#!/usr/bin/python3
 # 
 # Chocolate Doom self-documentation tool.  This works similar to javadoc
 # or doxygen, but documents command line parameters and configuration
 # file values, generating documentation in Unix manpage, wikitext and
diff -U4 -r chocolate-doom-3.0.1--orig/man/simplecpp chocolate-doom-3.0.1--patched/man/simplecpp
--- chocolate-doom-3.0.1--orig/man/simplecpp	2020-04-04 21:49:05.000000000 +0200
+++ chocolate-doom-3.0.1--patched/man/simplecpp	2022-02-01 18:32:33.854381649 +0100
@@ -1,5 +1,5 @@
-#!/usr/bin/env python
+#!/usr/bin/python3
 #
 # Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
 # Contributors to the Freedoom project.  All rights reserved.
 #
diff -U4 -r chocolate-doom-3.0.1--orig/textscreen/fonts/convert-font chocolate-doom-3.0.1--patched/textscreen/fonts/convert-font
--- chocolate-doom-3.0.1--orig/textscreen/fonts/convert-font	2020-04-04 21:49:06.000000000 +0200
+++ chocolate-doom-3.0.1--patched/textscreen/fonts/convert-font	2022-02-01 18:29:15.403142913 +0100
@@ -1,5 +1,5 @@
-#!/usr/bin/env python
+#!/usr/bin/python3
 #
 # Copyright(C) 2016 Simon Howard
 #
 # This program is free software; you can redistribute it and/or