Remove build-zig-package

Turns out this actually is already implemented upstream.

flake.nix

@@ -11,19 +11,23 @@
       let
         pkgs = import nixpkgs { inherit system; };
         zig = pkgs.zig_0_11;
-        buildZigPackage = import ./nix/build-zig-package.nix {
-          inherit (pkgs) stdenv;
-          inherit zig;
-        };
       in
       {
         devShells.default = pkgs.mkShellNoCC {
           buildInputs = [ zig pkgs.zls ];
         };
 
-        packages.default = buildZigPackage {
+        packages.default = pkgs.stdenv.mkDerivation {
           name = "aoc23";
           src = pkgs.nix-gitignore.gitignoreSource [ ] ./.;
+
+          nativeBuildInputs = [ zig.hook ];
+
+          meta = {
+            description = "Advent of Code 2023";
+            homepage = "https://git.xeal.me/xeals/aoc23";
+            inherit (zig.meta) platforms;
+          };
         };
       });
 }

nix/build-zig-package.nix

@@ -1,57 +0,0 @@
-{ stdenv
-, zig
-}:
-
-{ buildInputs ? [ ]
-, nativeBuildInputs ? [ ]
-, optimize ? "ReleaseSafe"
-, meta ? { }
-, ...
-}@args:
-
-stdenv.mkDerivation (args // {
-  nativeBuildInputs = nativeBuildInputs ++ [
-    zig
-  ];
-
-  buildInputs = buildInputs;
-
-  strictDeps = true;
-
-  configurePhase = args.configurePhase or ''
-    runHook preConfigure
-    runHook postConfigure
-  '';
-
-  ZIGFLAGS = args.ZIGFLAGS or [
-    "-Doptimize=${optimize}"
-  ];
-
-  # https://github.com/ziglang/zig/issues/6810 requires setting XDG_CACHE_HOME
-  # in all zig build phases. --cache-dir and --global-cache-dir do not prevent
-  # the builder from attempting to create the XDG cache.
-
-  buildPhase = args.buildPhase or ''
-    runHook preBuild
-    XDG_CACHE_HOME=_cache zig build $ZIGFLAGS
-    runHook postBuild
-  '';
-
-  doCheck = args.doCheck or true;
-  checkPhase = args.checkPhase or ''
-    runHook preCheck
-    XDG_CACHE_HOME=_cache zig build test $ZIGFLAGS
-    runHook postCheck
-  '';
-
-  installPhase = args.installPhase or ''
-    runHook preInstall
-    XDG_CACHE_HOME=_cache zig build install --prefix $out $ZIGFLAGS
-    runHook postInstall
-  '';
-
-  meta = {
-    # default to Zig's platforms
-    platforms = zig.meta.platforms;
-  } // meta;
-})