`cache folder contains root-owned files` error with `buildNpmPackage`

Good morning.

I’m writing this post because I’m facing a strange error with buildNpmPackage that doesn’t seem to be documented anywhere.

When trying to build the attached flake, in fact, NPM fails with the following error:

npm ERR! path /nix/store/lygyvacyjpmfsji3ym4n4d2wi4fxc0h5-antares-v0.7.9-npm-deps/_cacache/tmp
npm ERR! errno -13
npm ERR! 
npm ERR! Your cache folder contains root-owned files, due to a bug in
npm ERR! previous versions of npm which has since been addressed.
npm ERR! 
npm ERR! To permanently fix this problem, please run:
npm ERR!   sudo chown -R 1000:100 "/nix/store/lygyvacyjpmfsji3ym4n4d2wi4fxc0h5-antares-v0.7.9-npm-deps"

npm ERR! Log files were not written due to an error writing to the directory: /nix/store/lygyvacyjpmfsji3ym4n4d2wi4fxc0h5-antares-v0.7.9-npm-deps/_logs
npm ERR! You can rerun the command with `--loglevel=verbose` to see the logs in your terminal

Personally, I find this pretty puzzling, as (citing the nixpkgs manual) "buildNpmPackage allows you to package npm-based projects in Nixpkgs without the use of an auto-generated dependencies files […] by […] creating a reproducible cache that contains the dependencies of a project, and pointing npm to it", which makes links to the root-owned Nix Store expected.

Can someone point me to what I’ve done wrong in writing the derivation? Thank you very much in advance!

My flake.nix:

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

  outputs = { self, nixpkgs, flake-utils }:
    flake-utils.lib.eachDefaultSystem (
      system: let
        pkgs = import nixpkgs { inherit system; };
        antaressql = pkgs.buildNpmPackage {
          pname = "antares";
          version = "v0.7.9";

          src = pkgs.fetchFromGitHub {
            owner = "antares-sql";
            repo = "antares";
            rev = "v0.7.9";
            sha256 = "sha256-QCXQFRW/lLMELQLclRmCZnXorWJrAQaXKHIGsKNLZuI=";

          npmDepsHash = "sha256-0Jb2WnUDXv6SjtnUx3854YKz4XEcRNpDH3KYQb3o1pw=";

          defaultPackage = antaressql;

I’ve been seeing the exact same error trying to build the quartz static site generator. Did you ever figure out what was going on here?