I took vencord from nixpkgs as an example package and swapped out the existing fetchPnpmDeps-based tooling for importPnpmLock: https://tangled.org/scrumplex.net/importPnpmLock.nix/blob/main/checks/vencord.nix

I also started to use this for some of my personal projects.

It may run into some edge cases and the interface isn't finalized, but it works great for being a PoC

{
  lib,
  pkgs,
  buildNpmPackage,
  importNpmLock,
  nodejs ? pkgs.nodejs_22,
  ...
}:

buildNpmPackage (finalAttrs: {
  pname = "ooye";
  version = "3.4";

  src = builtins.fetchGit {
    url = https://gitdab.com/cadence/out-of-your-element/;
    rev = "c55e6c611585f4c1dbfd8c767e5f872fbeb0c66a";
    ref = "v${finalAttrs.version}";
  };

  npmDepsHash = "";

  npmDeps = importNpmLock { npmRoot = finalAttrs.src; };

  npmConfigHook = importNpmLock.npmConfigHook;
  dontNpmBuild = true;

  installPhase = ''
    runHook preInstall
    mkdir -p $out
    mkdir -p $out/bin
    cp -R . $out/source
    makeWrapper ${nodejs}/bin/node $out/bin/ooye-setup --add-flags $out/source/scripts/setup.js
    makeWrapper ${nodejs}/bin/node $out/bin/ooye --add-flags $out/source/start.js
    runHook postInstall
  '';

  npmPackFlags = [ "--ignore-scripts" ];
})

In reply to @azban:matrix.org
any idea why that wouldn't be the case with this config? https://github.com/NixOS/nixpkgs/blob/51600fecc3d3a57353c4f9cf72a22f1f9efc58ae/pkgs/by-name/ea/eas-cli/package.nix