diff --git a/pkgs/applications/window-managers/openbox/default.nix b/pkgs/applications/window-managers/openbox/default.nix
index a4ec6d067dc..39329e8004c 100644
--- a/pkgs/applications/window-managers/openbox/default.nix
+++ b/pkgs/applications/window-managers/openbox/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, pkgconfig, python2
+{ stdenv, fetchurl, autoreconfHook, pkgconfig, python3
 , libxml2, libXinerama, libXcursor, libXau, libXrandr, libICE, libSM
 , imlib2, pango, libstartup_notification, makeWrapper }:
 
@@ -7,22 +7,24 @@ stdenv.mkDerivation rec {
   version = "3.6.1";
 
   nativeBuildInputs = [
+    autoreconfHook
     pkgconfig
     makeWrapper
-    python2.pkgs.wrapPython
+    python3.pkgs.wrapPython
   ];
 
   buildInputs = [
     libxml2
     libXinerama libXcursor libXau libXrandr libICE libSM
     libstartup_notification
+    python3
   ];
 
   propagatedBuildInputs = [
     pango imlib2
   ];
 
-  pythonPath = with python2.pkgs; [
+  pythonPath = with python3.pkgs; [
     pyxdg
   ];
 
@@ -36,6 +38,15 @@ stdenv.mkDerivation rec {
     sha256 = "1ci9lq4qqhl31yz1jwwjiawah0f7x0vx44ap8baw7r6rdi00pyiv";
   };
 
+  patches = [
+    # Use fetchurl to avoid "fetchpatch: ignores file renames" #32084
+    # This patch adds python3 support
+    (fetchurl {
+      url = "https://git.archlinux.org/svntogit/community.git/plain/openbox/trunk/py3.patch?id=90cb57ef53d952bb6ab4c33a184f815bbe1791c0";
+      sha256 = "1ks99awlkhd5ph9kz94s1r6m1bfvh42g4rmxd14dyg5b421p1ljc";
+    })
+  ];
+
   postBuild = "gcc -O2 -o setlayout $(pkg-config --cflags --libs x11) $setlayoutSrc";
 
   # Openbox needs XDG_DATA_DIRS set or it can't find its default theme