these 2 derivations will be built:
  /nix/store/y08aidhmfcd9pi8pg5ba35wxydk9haby-nixos-test-driver-pg_graphql.drv
  /nix/store/vp3sfp0k1n40jki1aq937xm8gdc7l2ik-vm-test-run-pg_graphql.drv