diff --git a/modules/linuxcnc.nix b/modules/linuxcnc.nix
index 8d411af..ebe0aac 100644
--- a/modules/linuxcnc.nix
+++ b/modules/linuxcnc.nix
@@ -13,7 +13,7 @@ let
     '';
   });
 
-  pythonPkg = linuxcncWithEC.pythonPkg;
+  pythonPkg = linuxcncWithEC.buildInputs.pythonPkg;
   linuxcncEnv = pkgs.buildEnv {
     name = "linuxcnc-env";
     paths = with pkgs; [ linuxcncWithEC hal-cia402 linuxcnc-ethercat pythonPkg ];