Use flake-parts

flake.lock

@@ -1,5 +1,23 @@
 {
   "nodes": {
+    "flake-parts": {
+      "inputs": {
+        "nixpkgs-lib": "nixpkgs-lib"
+      },
+      "locked": {
+        "lastModified": 1719994518,
+        "narHash": "sha256-pQMhCCHyQGRzdfAkdJ4cIWiw+JNuWsTX7f0ZYSyz0VY=",
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "rev": "9227223f6d922fee3c7b190b2cc238a99527bbb7",
+        "type": "github"
+      },
+      "original": {
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "type": "github"
+      }
+    },
     "nixpkgs": {
       "locked": {
         "lastModified": 1717952948,
@@ -32,6 +50,18 @@
         "type": "github"
       }
     },
+    "nixpkgs-lib": {
+      "locked": {
+        "lastModified": 1719876945,
+        "narHash": "sha256-Fm2rDDs86sHy0/1jxTOKB1118Q0O3Uc7EC0iXvXKpbI=",
+        "type": "tarball",
+        "url": "https://github.com/NixOS/nixpkgs/archive/5daf0514482af3f97abaefc78a6606365c9108e2.tar.gz"
+      },
+      "original": {
+        "type": "tarball",
+        "url": "https://github.com/NixOS/nixpkgs/archive/5daf0514482af3f97abaefc78a6606365c9108e2.tar.gz"
+      }
+    },
     "nixpkgs-unstable": {
       "locked": {
         "lastModified": 1717786204,
@@ -50,6 +80,7 @@
     },
     "root": {
       "inputs": {
+        "flake-parts": "flake-parts",
         "nixpkgs": "nixpkgs",
         "nixpkgs-2305": "nixpkgs-2305",
         "nixpkgs-unstable": "nixpkgs-unstable"

flake.nix

@@ -1,32 +1,41 @@
 {
   inputs = {
+    flake-parts.url = "github:hercules-ci/flake-parts";
     nixpkgs-2305.url = "github:NixOS/nixpkgs/nixos-23.05";
-
     nixpkgs-unstable.url = "github:NixOS/nixpkgs/nixos-unstable";
-
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-24.05";
   };
 
   outputs =
-    { nixpkgs, self, ... }@inputs:
-    let
-      system = "x86_64-linux";
-      pkgs = nixpkgs.legacyPackages.${system};
-
-      lib = import ./lib { inherit inputs self; };
-
-      inherit (lib) mkNeovim mkVimPlugin;
-
-      default = mkVimPlugin { inherit system; };
-      neovim = mkNeovim { inherit system; };
-    in
-    {
-      inherit lib;
-
-      formatter.${system} = pkgs.nixfmt-rfc-style;
-
-      packages.${system} = {
-        inherit default neovim;
+    inputs@{ self, flake-parts, ... }:
+    flake-parts.lib.mkFlake { inherit inputs; } {
+      flake = {
+        lib = import ./lib { inherit inputs self; };
       };
+
+      systems = [ "x86_64-linux" ];
+
+      perSystem =
+        {
+          config,
+          pkgs,
+          system,
+          ...
+        }:
+        {
+          apps = {
+            nvim = {
+              program = "${config.packages.neovim}/bin/nvim";
+              type = "app";
+            };
+          };
+
+          packages = {
+            default = self.lib.mkVimPlugin { inherit system; };
+            neovim = self.lib.mkNeovim { inherit system; };
+          };
+
+          formatter = pkgs.nixfmt-rfc-style;
+        };
     };
 }