setup flake.nix with derivation and devShell

.gitignore

@@ -4,3 +4,4 @@ dwl
 *-protocol.h
 .ccls-cache
 config.h
+result

flake.lock

@@ -0,0 +1,27 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1772963539,
+        "narHash": "sha256-9jVDGZnvCckTGdYT53d/EfznygLskyLQXYwJLKMPsZs=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "9dcb002ca1690658be4a04645215baea8b95f31d",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,60 @@
+{
+  description = "A flake for dwl";
+
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs?ref=nixos-unstable";
+  };
+
+  outputs =
+    {
+      self,
+      nixpkgs,
+    }:
+    let
+      system = "x86_64-linux";
+      pkgs = nixpkgs.legacyPackages.${system};
+      nativeBuildInputs = with pkgs; [
+        tinycc
+        gnumake
+        pkg-config
+        wayland-protocols
+      ];
+      buildInputs = with pkgs; [
+        wayland-scanner
+        wlroots
+        libinput
+        wayland
+        libxkbcommon
+        pixman
+      ];
+      inherit (pkgs) lib;
+    in
+    {
+      devShell.${system} =
+        with pkgs;
+        mkShell {
+          inherit buildInputs nativeBuildInputs;
+        };
+      packages.${system} =
+        let
+          src = lib.fileset.toSource {
+            root = ./.;
+            fileset = lib.fileset.unions [
+              ./Makefile
+              ./client.h
+              ./config.def.h
+              ./config.mk
+              ./dwl.c
+              ./dwl.1
+              ./dwl.desktop
+              ./protocols
+              ./util.c
+              ./util.h
+            ];
+          };
+        in
+        {
+          default = pkgs.callPackage ./package.nix { inherit src buildInputs nativeBuildInputs; };
+        };
+    };
+}

package.nix

@@ -0,0 +1,27 @@
+{
+  lib,
+  src,
+  stdenv,
+  buildInputs,
+  nativeBuildInputs,
+}:
+stdenv.mkDerivation {
+  pname = "dwl";
+  version = "0.1.0";
+  inherit src buildInputs nativeBuildInputs;
+
+  makeFlags = [
+  ];
+
+  meta = {
+    description = "dwm for Wayland";
+    homepage = "https://codeberg.org/dwl/dwl";
+    platforms = lib.platforms.linux;
+    mainProgram = "dwl";
+  };
+
+  installPhase = ''
+    mkdir -p $out/
+    cp dwl $out/
+  '';
+}