Expose tf2/packages/default.nix as a function, so a custom nixpkgs instantiation can be provided

example/flake.nix

@@ -9,8 +9,8 @@
     packages.x86_64-linux.default =
       let
         pkgs = import inputs.nixpkgs { system = "x86_64-linux"; };
-        tf2pkgs = inputs.tf2-nix.packages.x86_64-linux;
-      in tf2pkgs.mergeTf2Configs (with tf2pkgs; [
+        tf2Pkgs = inputs.tf2-nix.lib.mkTf2Pkgs { inherit pkgs; };
+      in tf2Pkgs.mergeTf2Configs (with tf2Pkgs; [
         mastercomfig.presets.medium-low
         mastercomfig.addons.flat-mouse
         mastercomfig.addons.no-tutorial

flake.nix

@@ -7,13 +7,17 @@
   };
 
   outputs = { self, ... }@inputs:
+    let
+      # keep it as an attrset arg for future expandability
+      mkTf2Pkgs = { pkgs }: import ./tf2/packages { inherit pkgs; };
+    in
     inputs.flake-utils.lib.eachDefaultSystem (system:
       let
         pkgs = import inputs.nixpkgs { inherit system; };
-        lib = pkgs.lib;
       in {
-        legacyPackages = import ./tf2/packages {
-          inherit pkgs lib;
+        legacyPackages = mkTf2Pkgs pkgs;
+      })
+    // {
+      lib = { inherit mkTf2Pkgs; };
     };
-      });
 }

tf2/packages/default.nix

@@ -1,6 +1,8 @@
-{ pkgs, lib }:
+{ pkgs }:
 
 let
+  inherit (pkgs) lib;
+
   mkTf2Config = pkgs.callPackage ../mkTf2Config.nix {};
 
   fetchFromGameBanana =