Use home-manager as flake

Makefile

@@ -1,6 +0,0 @@
-.PHONY: update clean
-update:
-	home-manager switch --flake .#functionalhacker
-
-clean:
-	nix-collect-garbage -d

flake.nix

@@ -11,24 +11,21 @@
   };
 
   outputs = { nixpkgs, home-manager, ... }:
-    let
-      system = "x86_64-linux";
-      pkgs = import nixpkgs { inherit system; };
-    in
     {
       nixosConfigurations.Mirkwood = nixpkgs.lib.nixosSystem {
         system = "x86_64-linux";
         modules = [
-          ./common.nix
           ./hosts/Mirkwood/configuration.nix
-        ];
-      };
+          ./nixos_common.nix
 
-      homeConfigurations = {
-        functionalhacker = home-manager.lib.homeManagerConfiguration {
-          inherit pkgs;
-          modules = [ ./users/functionalhacker/home.nix ];
-        };
+          home-manager.nixosModules.home-manager
+          {
+            home-manager.useGlobalPkgs = true;
+            home-manager.useUserPackages = true;
+            home-manager.users.functionalhacker =
+              import ./users/functionalhacker/home.nix;
+          }
+        ];
       };
     };
 }

nixos_common.nix

@@ -64,16 +64,17 @@
       enable = true;
       nativeMessagingHosts.packages = [ pkgs.browserpass ];
     };
-    zsh = { enable = true; };
+    zsh.enable = true;
   };
 
-  environment.systemPackages = with pkgs; [
-    git
-    gnumake
-    home-manager
-    neovim
-    telegram-desktop
-    usbutils
-    wl-clipboard
-  ];
+  environment = {
+    shells = [ pkgs.zsh ];
+    systemPackages = with pkgs;
+      [
+        neovim
+        telegram-desktop
+        usbutils
+        wl-clipboard
+      ];
+  };
 }