these 2 derivations will be built:
  /nix/store/vryxk7qw17n1qcj1q5fb6mk50c9yny90-nixos-test-driver-pg_graphql.drv
  /nix/store/5s5mbx3x5k49bai2ylmbfgqycqa7lv9v-vm-test-run-pg_graphql.drv