these 2 derivations will be built:
  /nix/store/b5vng9icfx9mkmgy4clqmpw8pdvb063f-nixos-test-driver-pg_graphql.drv
  /nix/store/8vn7jgv5jj5pqcn0rxilb9dv151y18qx-vm-test-run-pg_graphql.drv