lib: Sugar syntax

lib/host.nix

@@ -1,6 +1,5 @@
 { pkgs
 , nixpkgs
-, nixos-unstable
 , unstablePkgs
 , home-manager
 , system
@@ -24,7 +23,7 @@
       add_imports = imports;
     in
     nixpkgs.lib.nixosSystem {
-      inherit system;
+      inherit system pkgs;
 
       modules = [
         {
@@ -33,27 +32,14 @@
             (mkSysRole "acme")
           ];
 
-          nixpkgs = { inherit pkgs; };
-
-          nix = {
-            nixPath = [
-              "nixpkgs=${nixpkgs}"
-              "unstable=${nixos-unstable}"
-            ];
-            registry = {
-              nixpkgs.flake = nixpkgs;
-              unstable.flake = nixos-unstable;
-            };
-          };
-
           home-manager = {
-            users.root.imports = pkgs.lib.singleton (mkHomeRole "common");
+            users.root.imports = [ (mkHomeRole "common") ];
             extraSpecialArgs.unstablePkgs = unstablePkgs;
             useGlobalPkgs = true;
           };
 
           system.stateVersion = "22.11";
-          
+
           environment.shells = [ pkgs.zsh ];
           users.defaultUserShell = pkgs.zsh;
         }