these 4 derivations will be built:
  /nix/store/ga9w3q3g3nf5v6bz8q8xm53qz7dswq4b-Fedora-Cloud-Base-Generic-42-1.1.x86_64.qcow2-nix-vm-test.qcow2.drv
  /nix/store/k7hfivz7fywc35fq2k83sb5242r7w9k5-run-vm-vm.drv
  /nix/store/ny765cpxr9k2lj19cmihlzdfkqib51i2-driver-configuration.json.drv
  /nix/store/79ng6065sqa4zfh0r3q5qcgs49ivb5b7-vm-test-fedora_42.drv