these 2 derivations will be built:
  /nix/store/fbl7diwk5xvng3bgz8fc7yzf1y56yx2n-nixos-test-driver-pg_graphql.drv
  /nix/store/1r5yvi0ksg3ab9ahwlinpmk5vlq10byr-vm-test-run-pg_graphql.drv