diff --git a/shell.nix b/shell.nix
index 25636ee..eb14ad5 100644
--- a/shell.nix
+++ b/shell.nix
@@ -1,8 +1,7 @@
-{
-	sources ? import ./nix/sources.nix,
-	pkgs ? import sources.nixpkgs {}
-}:
-
+let
+	sources = import ./nix/sources.nix;
+	pkgs = import sources.nixpkgs {};
+in
 pkgs.mkShell {
 	buildInputs = with pkgs; [
 		niv