diff --git a/pkgs/servers/klipper/default.nix b/pkgs/servers/klipper/default.nix
index 03b3504c68e..a9703045cd7 100644
--- a/pkgs/servers/klipper/default.nix
+++ b/pkgs/servers/klipper/default.nix
@@ -38,6 +38,10 @@ stdenv.mkDerivation rec {
       substituteInPlace $file \
         --replace '/usr/bin/env python2' '/usr/bin/env python'
     done
+
+    # needed for cross compilation
+    substituteInPlace ./chelper/__init__.py \
+      --replace 'GCC_CMD = "gcc"' 'GCC_CMD = "${stdenv.cc.targetPrefix}cc"'
   '';
 
   # NB: We don't move the main entry point into `/bin`, or even symlink it,