these 2 derivations will be built:
  /nix/store/xmx55qqr6d80bg64bqh90539ghm5xrbb-nixos-test-driver-pg_graphql.drv
  /nix/store/zc82r2b5dy15hxfxw3ww1p8nj6yw5mz1-vm-test-run-pg_graphql.drv