these 4 derivations will be built:
  /nix/store/bwgsphzmjlkd3ifm38srl083mf8arjbf-test-script.drv
  /nix/store/n4sk2r0a95mvyh1rmms3ssqsmd99gs7f-driverConfiguration.json.drv
  /nix/store/282i09rmaslxswimcxsdlbjh7m0lpqam-nixos-test-driver-systemd-portabled.drv
  /nix/store/26yh179p4mfbrbrzrh72hppdbxyd9nvy-vm-test-run-systemd-portabled.drv
this path will be fetched (12.8 MiB download, 12.8 MiB unpacked):
  /nix/store/lgfrsvcnlqcq354c42ynzcb6ah2cg349-demo-img-1.0