these 2 derivations will be built:
  /nix/store/k1si9zyb39gj4g33qhpg2g0v7vbmz3s6-jscpd-5.4.0.drv
  /nix/store/cbygs8hgfq6vpvfj44xaybkn4ng5zqmn-check-jscpd.drv