these 2 derivations will be built:
  /nix/store/2vygnirlk0y8124sk3qlwa568pi5w3zn-nixos-test-driver-pg_graphql.drv
  /nix/store/fa1gip6abr9jhm00vvfb3n5v6j4yb3bx-vm-test-run-pg_graphql.drv