diff --git a/0001-build-use-python3-exclusively.patch b/0001-build-use-python3-exclusively.patch
new file mode 100644
index 0000000..d45d5cb
--- /dev/null
+++ b/0001-build-use-python3-exclusively.patch
@@ -0,0 +1,89 @@
+From b291e003c04431557c7369c12f2febd1aa233109 Mon Sep 17 00:00:00 2001
+From: Fabian Greffrath <fabian@greffrath.com>
+Date: Fri, 27 Nov 2020 09:17:04 +0100
+Subject: [PATCH] build: use python3 exclusively
+
+Python 2 is deprecated and is going to be removed from Linux
+distributions in the short term [1,2]. Thus, (parts of) the build
+process will fail on current systems like e.g. Debian unstable.
+
+The /bin/python binary is not going to exist anymore. The canonical
+name for the Python 3 binary is, you guess it, /bin/python3. So, let's
+just use this during our build process and go future proof.
+
+Fixes #1158.
+
+[1] https://wiki.debian.org/Python#Python_in_Debian
+[2] https://wiki.debian.org/Python/2Removal
+---
+ configure.ac                  |    2 +-
+ data/convert-icon             |    2 +-
+ man/docgen                    |    2 +-
+ man/simplecpp                 |    2 +-
+ pkg/win32/cp-with-libs        |    2 +-
+ textscreen/fonts/convert-font |    2 +-
+ 6 files changed, 6 insertions(+), 6 deletions(-)
+
+Index: chocolate-doom-3.0.1/configure.ac
+===================================================================
+--- chocolate-doom-3.0.1.orig/configure.ac
++++ chocolate-doom-3.0.1/configure.ac
+@@ -16,7 +16,7 @@ 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
+ 
+Index: chocolate-doom-3.0.1/data/convert-icon
+===================================================================
+--- chocolate-doom-3.0.1.orig/data/convert-icon
++++ chocolate-doom-3.0.1/data/convert-icon
+@@ -1,4 +1,4 @@
+-#!/usr/bin/env python
++#!/usr/bin/env python3
+ #
+ # Copyright(C) 2005-2014 Simon Howard
+ #
+Index: chocolate-doom-3.0.1/man/docgen
+===================================================================
+--- chocolate-doom-3.0.1.orig/man/docgen
++++ chocolate-doom-3.0.1/man/docgen
+@@ -1,4 +1,4 @@
+-#!/usr/bin/env python
++#!/usr/bin/env python3
+ # 
+ # Chocolate Doom self-documentation tool.  This works similar to javadoc
+ # or doxygen, but documents command line parameters and configuration
+Index: chocolate-doom-3.0.1/man/simplecpp
+===================================================================
+--- chocolate-doom-3.0.1.orig/man/simplecpp
++++ chocolate-doom-3.0.1/man/simplecpp
+@@ -1,4 +1,4 @@
+-#!/usr/bin/env python
++#!/usr/bin/env python3
+ #
+ # Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
+ # Contributors to the Freedoom project.  All rights reserved.
+Index: chocolate-doom-3.0.1/pkg/win32/cp-with-libs
+===================================================================
+--- chocolate-doom-3.0.1.orig/pkg/win32/cp-with-libs
++++ chocolate-doom-3.0.1/pkg/win32/cp-with-libs
+@@ -1,4 +1,4 @@
+-#!/usr/bin/env python
++#!/usr/bin/env python3
+ #
+ # Copyright(C) 2016 Simon Howard
+ #
+Index: chocolate-doom-3.0.1/textscreen/fonts/convert-font
+===================================================================
+--- chocolate-doom-3.0.1.orig/textscreen/fonts/convert-font
++++ chocolate-doom-3.0.1/textscreen/fonts/convert-font
+@@ -1,4 +1,4 @@
+-#!/usr/bin/env python
++#!/usr/bin/env python3
+ #
+ # Copyright(C) 2016 Simon Howard
+ #
diff --git a/chocolate-doom.changes b/chocolate-doom.changes
index 8f368f3..e7b6dca 100644
--- a/chocolate-doom.changes
+++ b/chocolate-doom.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Sat Jun 26 09:13:01 UTC 2021 - Jan Engelhardt <jengelh@inai.de>
+
+- Add 0001-build-use-python3-exclusively.patch so we can build
+  without python2.
+
 -------------------------------------------------------------------
 Wed Jul  1 15:43:07 UTC 2020 - Jan Engelhardt <jengelh@inai.de>
 
diff --git a/chocolate-doom.spec b/chocolate-doom.spec
index 8982f8d..076a612 100644
--- a/chocolate-doom.spec
+++ b/chocolate-doom.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package chocolate-doom
 #
-# Copyright (c) 2020 SUSE LLC
+# Copyright (c) 2021 SUSE LLC
 #
 # All modifications and additions to the file contributed by third parties
 # remain the property of their copyright owners, unless otherwise agreed
@@ -29,10 +29,12 @@ Source:         http://www.chocolate-doom.org/downloads/%version/%name-%version.
 Source2:        http://www.chocolate-doom.org/downloads/%version/%name-%version.tar.gz.asc
 Source3:        %name.keyring
 Patch1:         chdoom-iwaddir.diff
+Patch2:         0001-build-use-python3-exclusively.patch
 BuildRequires:  autoconf
 BuildRequires:  automake
 BuildRequires:  fdupes
-BuildRequires:  python
+BuildRequires:  python3-Pillow
+BuildRequires:  python3-base
 BuildRequires:  update-desktop-files
 BuildRequires:  pkgconfig(SDL2_mixer) >= 2.0.0
 BuildRequires:  pkgconfig(SDL2_net) >= 2.0.0
@@ -64,13 +66,12 @@ Supplements:    packageand(chocolate-doom:bash-completion)
 Additions for bash-completion to support chocolate-doom.
 
 %prep
-%setup -Tqb0
-%patch -P 1 -p1
+%autosetup -p1
 
 %build
 autoreconf -fi
 %configure CFLAGS="%optflags -fcommon"
-make %{?_smp_mflags}
+%make_build
 
 %install
 b="%buildroot"