these 2 derivations will be built:
  /nix/store/3zrhx9qq5385j8xqb0dkmf4m86n54i82-nixos-test-driver-pg_graphql.drv
  /nix/store/rrh5p4b0klpwhhb5xjabm9d01xmqqm82-vm-test-run-pg_graphql.drv