these 4 derivations will be built:
  /nix/store/c03q16w97cp5bnvrdzz2x30gdzj721nj-Fedora-Cloud-Base-Generic-43-1.6.x86_64.qcow2-nix-vm-test.qcow2.drv
  /nix/store/2hqwr2c804rp0mnia1z9180p1d7pf1ac-run-vm-vm.drv
  /nix/store/n8i20mklc2y1pssxmg339lhs4zx7ym36-driver-configuration.json.drv
  /nix/store/lw0fbmvpc1ih8prlpiv8vavwdgwhcdr4-vm-test-fedora_43.drv