these 2 derivations will be built:
  /nix/store/w2qnj88xy9rsls3lf2sqnx7z7krgv2hs-nixos-test-driver-pg_graphql.drv
  /nix/store/qfsnfzmzc70s3fl2f8g2m5hrd66msx7k-vm-test-run-pg_graphql.drv