registry: add all flake inputs

modules/system/nix/module.nix

@@ -10,8 +10,7 @@
 in {
   imports = [
     ./documentation.nix # nixos documentation
-    ./nixpkgs.nix # global nixpkgs configuration.nix
-    ./registry.nix
+    ./nixpkgs.nix # global nixpkgs configuration
 
     inputs.lix-module.nixosModules.default
   ];
@@ -24,6 +23,10 @@ in {
     # fuck channels, no thanks
     channel.enable = mkForce false;
 
+    # this is taken from sioodmy.
+    # pin the registry to avoid downloading and evaling a new nixpkgs version every time
+    registry = lib.mapAttrs (_: v: {flake = v;}) inputs;
+
     # This will additionally add your inputs to the system's legacy channels
     # Making legacy nix commands consistent as well
     nixPath = mapAttrsToList (key: _: "${key}=flake:${key}") config.nix.registry;

modules/system/nix/registry.nix

@@ -1,9 +0,0 @@
-{inputs, ...}: {
-  # Big thanks to Dianimo for this!
-  nix = {
-    registry = {
-      nixpkgs.flake = inputs.nixpkgs;
-      default.flake = inputs.nixpkgs;
-    };
-  };
-}