diff --git a/panel/default.nix b/panel/default.nix
index 0c39fce6..295671b0 100644
--- a/panel/default.nix
+++ b/panel/default.nix
@@ -6,14 +6,17 @@
     config = { };
     overlays = [ (import ./nix/overlay.nix) ];
   },
-}:
+}@args:
 let
   inherit (pkgs) lib;
   manage = pkgs.writeScriptBin "manage" ''
     exec ${pkgs.lib.getExe pkgs.python3} ${toString ./src/manage.py} $@
   '';
 in
-{
+# re-export inputs so they can be overridden granularly
+# (they can't be accessed from the outside any other way)
+args
+// {
   shell = pkgs.mkShellNoCC {
     inputsFrom = [ (pkgs.callPackage ./nix/package.nix { }) ];
     packages = [
@@ -38,12 +41,4 @@ in
 
   module = import ./nix/configuration.nix;
   tests = pkgs.callPackage ./nix/tests.nix { };
-
-  # re-export inputs so they can be overridden granularly
-  # (they can't be accessed from the outside any other way)
-  inherit
-    sources
-    system
-    pkgs
-    ;
 }