these 2 derivations will be built:
  /nix/store/j0pg5dkxhykihqapk8yh1v56c226jsh9-jscpd-5.1.1-vendor.drv
  /nix/store/7lahzhgc9ij83fcj97w7a4r4hq07rqp4-jscpd-5.1.1.drv