these 2 derivations will be built:
  /nix/store/bj9s0vx4mqxjz85zgd5zhwx6wyy0bsvf-nixos-test-driver-pg_hashids.drv
  /nix/store/krfy5xphl3blkx9y1wn6xf6xk6r0fwqj-vm-test-run-pg_hashids.drv