these 2 derivations will be built:
  /nix/store/3xz37zpcns5cyfqhfx249n29cgpfwvxc-jscpd-5.1.0-vendor.drv
  /nix/store/dc6h51plx49r6ynq3mqvs1gfmyf1lkbb-jscpd-5.1.0.drv