feat(nix): move go into overlay

Author: doprz

flake.nix

@@ -20,6 +20,7 @@
       perSystem =
         {
           pkgs,
+          system,
           ...
         }:
         let
@@ -32,7 +33,9 @@
             else
               throw "Could not extract Go version from go.mod";
 
-          go = pkgs."go_${builtins.replaceStrings [ "." ] [ "_" ] goVersion}";
+          goOverlay = final: prev: {
+            go = prev."go_${builtins.replaceStrings [ "." ] [ "_" ] goVersion}";
+          };
 
           lazygit = pkgs.buildGoModule rec {
             pname = "lazygit";
@@ -76,6 +79,12 @@
           };
         in
         {
+          _module.args.pkgs = import inputs.nixpkgs {
+            inherit system;
+            overlays = [ goOverlay ];
+            config = { };
+          };
+
           packages = {
             default = lazygit;
             inherit lazygit;