refactor(flake): tidy up inputs attrset

flake.nix

@@ -10,13 +10,17 @@
       url = "github:mrcjkb/nix-gen-luarc-json";
       inputs.nixpkgs.follows = "nixpkgs";
     };
+    # Add bleeding-edge plugins here.
+    # They can be updated with `nix flake update` (make sure to commit the generated flake.lock)
+    # wf-nvim = {
+    #   url = "github:Cassin01/wf.nvim";
+    #   flake = false;
+    # };
   };
-
   outputs = inputs @ {
     self,
     nixpkgs,
     flake-utils,
-    gen-luarc,
     ...
   }: let
     systems = builtins.attrNames nixpkgs.legacyPackages;
@@ -27,10 +31,14 @@
     flake-utils.lib.eachSystem systems (system: let
       pkgs = import nixpkgs {
         inherit system;
+        config.allowUnfree = true;
         overlays = [
-          inputs.neovim-nightly-overlay.overlays.default
-          gen-luarc.overlays.default
+          # inputs.neovim-nightly-overlay.overlays.default
           neovim-overlay
+          # This adds a function can be used to generate a .luarc.json
+          # containing the Neovim API all plugins in the workspace directory.
+          # The generated file can be symlinked in the devShell's shellHook.
+          inputs.gen-luarc.overlays.default
         ];
       };
       shell = pkgs.mkShell {
@@ -43,6 +51,7 @@
           nvim-dev
         ];
         shellHook = ''
+          # symlink the .luarc.json generated in the overlay
           ln -fs ${pkgs.nvim-luarc-json} .luarc.json
           # allow quick iteration of lua configs
           ln -Tfns $PWD/nvim ~/.config/nvim-dev