yes, here is the flake:

{
  description = "Blog";

  inputs = {
    flake-utils.url = "github:numtide/flake-utils";
    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
  };

  outputs = { flake-utils, nixpkgs, self }:
    flake-utils.lib.eachDefaultSystem (system:
      let pkgs = import nixpkgs { inherit system; }; in
      {
        devShells.default = pkgs.mkShell {
          packages = with pkgs; [
            nodejs_21
            prefetch-npm-deps
          ];
        };
        formatter = pkgs.nixpkgs-fmt;
        packages.default =
          let
            packageJson = builtins.fromJSON (builtins.readFile ./package.json);
          in
          pkgs.buildNpmPackage {
            pname = packageJson.name;
            version = packageJson.version;
            npmDepsHash = "sha256-gjQCVQI7Tp+L6ZF9phJFZQaaPwtPDp0xVOYMF+CPHIg=";

            src = ./.;

            BUILD_ID = self.rev or self.dirtyRev;
            NEXT_TELEMETRY_DISABLED = 1;

            #installPhase = ''
            #  runHook preInstall
            #  cp -r out $out
            #  runHook postInstall
            #'';
          };
      }
    );
}

In reply to @9hp71n:matrix.org
Did you git add that file ?

In reply to @kranzes:matrix.org
Is this because of npmHooks?

Essentially it's just this:

stdenv.mkDerivation (args // {
  inherit npmDeps npmBuildScript;

  nativeBuildInputs = nativeBuildInputs
    ++ [ nodejs npmConfigHook npmBuildHook npmInstallHook nodejs.python ]
    ++ lib.optionals stdenv.isDarwin [ darwin.cctools ];
  buildInputs = buildInputs ++ [ nodejs ];

  strictDeps = true;

  # Stripping takes way too long with the amount of files required by a typical Node.js project.
  dontStrip = args.dontStrip or true;

  meta = (args.meta or { }) // { platforms = args.meta.platforms or nodejs.meta.platforms; };
})

In reply to @julia:the-apothecary.club
looks like you solved your issue?