these 2 derivations will be built:
  /nix/store/s4b371azrdfpqxp174wz7qmalccddln9-nixos-test-driver-pg_hashids.drv
  /nix/store/p7bca3va438cxlqnqsj2fldbs16whqxv-vm-test-run-pg_hashids.drv