diff --git a/flake.nix b/flake.nix
index b942dc9..44a076c 100644
--- a/flake.nix
+++ b/flake.nix
@@ -17,44 +17,47 @@
     nixpkgs.url = "nixpkgs/20.09";
   };
 
-  outputs = { self, nixpkgs, resume-cli, nix-extras, flake-utils }: flake-utils.lib.eachSystem [ "x86_64-linux" ]
-    (system:
-      let
-        pkgs = import nixpkgs {
-          inherit system;
-        };
-        dbg = pkgs.lib.traceVal;
-        callNode2nix = import "${nix-extras}/callNode2nix.nix";
-        node2nix = callNode2nix { inherit pkgs; name = "resume-cli"; package = "${resume-cli}/package.json"; packageLock = "${resume-cli}/package-lock.json"; };
-        nixifiedSrc =
-          with pkgs;
-          (runCommandLocal "node2nix-merge" { } ''
-            mkdir -p $out
-            cp -r ${resume-cli}/* $out
-            cp -rf ${node2nix}/* $out/ 
-          ''
-          );
-        nodePackages = pkgs.callPackage "${nixifiedSrc}" { inherit pkgs system; };
-        override = nodePackages // {
-          package = nodePackages.package.override {
-            PUPPETEER_SKIP_DOWNLOAD = 1;
-            PUPPETEER_SKIP_CHROMIUM_DOWNLOAD = 1;
-            buildInputs = [ pkgs.chromium ];
-            nativeBuildInputs = [ pkgs.makeWrapper ];
-            postInstall = ''
-              wrapProgram $out/bin/resume \
-              --set PUPPETEER_EXECUTABLE_PATH ${pkgs.chromium.outPath}/bin/chromium
-            '';
+  outputs = { self, nixpkgs, resume-cli, nix-extras, flake-utils }:
+    let
+      forPkgs = pkgs:
+        let
+          dbg = pkgs.lib.traceVal;
+          callNode2nix = import "${nix-extras}/callNode2nix.nix";
+          node2nix = callNode2nix { inherit pkgs; name = "resume-cli"; package = "${resume-cli}/package.json"; packageLock = "${resume-cli}/package-lock.json"; };
+          nixifiedSrc =
+            with pkgs;
+            (runCommandLocal "node2nix-merge" { } ''
+              mkdir -p $out
+              cp -r ${resume-cli}/* $out
+              cp -rf ${node2nix}/* $out/ 
+            ''
+            );
+          nodePackages = pkgs.callPackage "${nixifiedSrc}" { inherit pkgs; system = pkgs.system; };
+          override = nodePackages // {
+            package = nodePackages.package.override {
+              PUPPETEER_SKIP_DOWNLOAD = 1;
+              PUPPETEER_SKIP_CHROMIUM_DOWNLOAD = 1;
+              buildInputs = [ pkgs.chromium ];
+              nativeBuildInputs = [ pkgs.makeWrapper ];
+              postInstall = ''
+                wrapProgram $out/bin/resume \
+                --set PUPPETEER_EXECUTABLE_PATH ${pkgs.chromium.outPath}/bin/chromium
+              '';
+            };
+          };
+        in
+        rec {
+          packages.resume-cli = override.package;
+          defaultPackage = packages.resume-cli;
+          apps.resume-cli = flake-utils.lib.mkApp { drv = defaultPackage; exePath = "/bin/resume"; };
+          defaultApp = apps.resume-cli;
+          devShell = with pkgs; mkShell {
+            buildInputs = [ nodejs packages.resume-cli ];
           };
         };
-      in
-      rec {
-        packages.resume-cli = override.package;
-        defaultPackage = packages.resume-cli;
-        apps.resume-cli = flake-utils.lib.mkApp { drv = defaultPackage; exePath = "/bin/resume"; };
-        defaultApp = apps.resume-cli;
-        devShell = with pkgs; mkShell {
-          buildInputs = [ nodejs packages.resume-cli ];
-        };
-      });
+      forSystem = system: forPkgs (import nixpkgs { inherit system; });
+    in
+    (flake-utils.lib.eachSystem [ "x86_64-linux" ] forSystem) // {
+      overlay = final: prev: (forPkgs final).packages;
+    };
 }