diff --git a/pkgs/servers/klipper/default.nix b/pkgs/servers/klipper/default.nix
index ffaf4ee7a957..7f6d40483cc2 100644
--- a/pkgs/servers/klipper/default.nix
+++ b/pkgs/servers/klipper/default.nix
@@ -3,6 +3,7 @@
   lib,
   fetchFromGitHub,
   python3,
+  extraPythonPackages ? ps: [ ],
   unstableGitUpdater,
   makeWrapper,
   writeShellScript,
@@ -29,7 +30,9 @@ stdenv.mkDerivation rec {
 
   buildInputs = [
     (python3.withPackages (
-      p: with p; [
+      p:
+      with p;
+      [
         python-can
         cffi
         pyserial
@@ -38,6 +41,7 @@ stdenv.mkDerivation rec {
         markupsafe
         numpy
       ]
+      ++ extraPythonPackages p
     ))
   ];