feat: drop flake-parts

flake.lock

@@ -1,25 +1,5 @@
 {
   "nodes": {
-    "flake-parts": {
-      "inputs": {
-        "nixpkgs-lib": [
-          "nixpkgs"
-        ]
-      },
-      "locked": {
-        "lastModified": 1730504689,
-        "narHash": "sha256-hgmguH29K2fvs9szpq2r3pz2/8cJd2LPS+b4tfNFCwE=",
-        "owner": "hercules-ci",
-        "repo": "flake-parts",
-        "rev": "506278e768c2a08bec68eb62932193e341f55c90",
-        "type": "github"
-      },
-      "original": {
-        "owner": "hercules-ci",
-        "repo": "flake-parts",
-        "type": "github"
-      }
-    },
     "nixpkgs": {
       "locked": {
         "lastModified": 1730531603,
@@ -38,7 +18,6 @@
     },
     "root": {
       "inputs": {
-        "flake-parts": "flake-parts",
         "nixpkgs": "nixpkgs"
       }
     }

flake.nix

@@ -3,44 +3,35 @@
 
   inputs = {
     nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
-
-    flake-parts = {
-      url = "github:hercules-ci/flake-parts";
-      inputs.nixpkgs-lib.follows = "nixpkgs";
-    };
   };
 
   outputs = {
     self,
-    flake-parts,
-    ...
-  } @ inputs:
-    flake-parts.lib.mkFlake {inherit inputs;} {
+    nixpkgs,
+  }: let
+    inherit (nixpkgs) lib;
+
     systems = ["x86_64-linux" "aarch64-linux" "x86_64-darwin" "aarch64-darwin"];
 
-      perSystem = {
-        lib,
-        pkgs,
-        system,
-        ...
-      }: {
-        # output packages only if they are available on the system
-        packages = let
+    pkgsFor = system: import nixpkgs {inherit system;};
+    forEachSystem = lib.genAttrs systems;
+  in {
+    packages = forEachSystem (
+      system: let
+        pkgs = pkgsFor system;
         isAvailable = name: drv: lib.meta.availableOn {inherit system;} drv;
         flakePkgs = self.overlays.default {} pkgs;
       in
-          lib.filterAttrs isAvailable flakePkgs;
+        lib.filterAttrs isAvailable flakePkgs
+    );
 
-        formatter = pkgs.alejandra;
-      };
-
-      flake = {
     overlays.default = import ./pkgs/all-packages.nix;
 
     nixosModules = {
       reposilite = import ./modules/reposilite.nix;
       asus-numpad = import ./modules/asus-numpad.nix self;
     };
-      };
+
+    formatter = forEachSystem (system: (pkgsFor system).alejandra);
   };
 }