these 4 derivations will be built:
  /nix/store/x7wp89k8mklg9swvf5z4vf8w1y4zqi0r-test-script.drv
  /nix/store/l4m770vaw52qbk49s6xdhl808r8alf2q-driverConfiguration.json.drv
  /nix/store/cdy3dgvc9i2b6fc4ym6y4p3zcwj9p5hh-nixos-test-driver-pg_cron.drv
  /nix/store/5adygcx9q3fl4vb31qrnfzayr2g5nz1z-vm-test-run-pg_cron.drv