these 2 derivations will be built:
  /nix/store/4dpzwhn1kk1c9ynq80kqv3vspcmlp3bj-nixos-test-driver-pg_hashids.drv
  /nix/store/gxrys7lzwmvmbgj8x05k78ci6xk9pvjh-vm-test-run-pg_hashids.drv