these 2 derivations will be built:
  /nix/store/0771zrj6ngcajp4imapxhqhawn8dd1c4-nixos-test-driver-pg_net.drv
  /nix/store/n6fbs479pxxmvbzy9nz5a26yf7a7r5j6-vm-test-run-pg_net.drv