diff --git a/stm32.nix b/stm32.nix
index fb5bebf..6fb5f35 100644
--- a/stm32.nix
+++ b/stm32.nix
@@ -1,7 +1,7 @@
 { pkgs ? import <nixpkgs> {}, rustManifest ? ./stm32/channel-rust-nightly.toml }:
 
 let
-  jobs = pkgs.callPackage ./stm32/default.nix {
+  jobs = import ./stm32/default.nix {
     inherit rustManifest;
     mozillaOverlay = import <mozillaOverlay>;
   };