diff --git a/flake.nix b/flake.nix
index e745bbd..5695498 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,13 +1,18 @@
 {
   inputs.nixpkgs.url = "github:NixOS/nixpkgs?ref=nixos-unstable";
 
-  outputs = {nixpkgs, ...}: let
+  outputs = {
+    self,
+    nixpkgs,
+    ...
+  }: let
     systems = ["x86_64-linux" "aarch64-linux"];
     forEachSystem = nixpkgs.lib.genAttrs systems;
     pkgsForEach = nixpkgs.legacyPackages;
   in {
     packages = forEachSystem (system: {
-      default = pkgsForEach.${system}.callPackage ./nix/package.nix {};
+      rogged = pkgsForEach.${system}.callPackage ./nix/package.nix {};
+      default = self.packages.${system}.rogged;
     });
 
     devShells = forEachSystem (system: {
diff --git a/nix/package.nix b/nix/package.nix
index 8fb5c18..0177a10 100644
--- a/nix/package.nix
+++ b/nix/package.nix
@@ -5,14 +5,23 @@
   raylib,
   pkg-config,
 }:
-stdenv.mkDerivation (finalAttrs: {
+stdenv.mkDerivation {
   pname = "rogged";
   version = "0.0.1";
 
-  src = builtins.path {
-    path = ../.;
-    name = finalAttrs.pname;
-  };
+  src = let
+    fs = lib.fileset;
+    s = ../.;
+  in
+    fs.toSource {
+      root = s;
+      fileset = fs.unions [
+        (s + /assets)
+        (s + /libs)
+        (s + /src)
+        (s + /build.zig)
+      ];
+    };
 
   nativeBuildInputs = [
     zig
@@ -21,25 +30,9 @@ stdenv.mkDerivation (finalAttrs: {
 
   buildInputs = [raylib];
 
-  dontConfigure = true;
-
-  buildPhase = ''
-    runHook preBuild
-    export ZIG_GLOBAL_CACHE_DIR="$TMPDIR/zig-cache"
-    zig build --release=fast
-    runHook postBuild
-  '';
-
-  installPhase = ''
-    runHook preInstall
-    mkdir -p $out/bin
-    cp zig-out/bin/roguelike $out/bin/
-    runHook postInstall
-  '';
-
   meta = {
     description = "A turn-based roguelike game";
     license = lib.licenses.mit;
     mainProgram = "roguelike";
   };
-})
+}