these 2 derivations will be built:
  /nix/store/1ddlscpn1j05qjk2agrwqrm5gys67ryr-gitnexus-1.6.12.drv
  /nix/store/1gl4q3niqm8xfx7rwqv5isf00x1yqwv0-check-gitnexus.drv