More strictly control what goes into elm.nix

elm.nix

@@ -1,6 +1,4 @@
-{ pkgs }:
-
-with pkgs;
+{ lib, stdenv, elm, fetchElmDeps, uglify-js,  }:
 
 let
   mkDerivation =
@@ -15,10 +13,10 @@ let
     stdenv.mkDerivation {
       inherit name src;
 
-      buildInputs = [ elmPackages.elm ]
-        ++ lib.optional outputJavaScript nodePackages.uglify-js;
+      buildInputs = [ elm ]
+        ++ lib.optional outputJavaScript uglify-js;
 
-      buildPhase = pkgs.elmPackages.fetchElmDeps {
+      buildPhase = fetchElmDeps {
         elmPackages = import srcs;
         elmVersion = "0.19.1";
         inherit registryDat;

flake.nix

@@ -6,13 +6,17 @@
   outputs = { self, nixpkgs, flake-utils }:
     flake-utils.lib.eachDefaultSystem (
       system:
-	let
-	  pkgs = import nixpkgs { inherit system; };
-	  bergamot-elm = import ./elm.nix { inherit pkgs; };
-	in
-	  {
-	    packages = { inherit bergamot-elm; };
-	    defaultPackage = bergamot-elm;
-	  }
+    let
+      pkgs = import nixpkgs { inherit system; };
+      bergamot-elm = import ./elm.nix {
+        inherit (pkgs) lib stdenv;
+	inherit (pkgs.elmPackages) fetchElmDeps elm;
+	inherit (pkgs.nodePackages) uglify-js;
+      };
+    in
+      {
+        packages = { inherit bergamot-elm; };
+        defaultPackage = bergamot-elm;
+      }
     );
 }