these 6 derivations will be built:
  /nix/store/yyxnn2r6a509avm1svwcbd8y80k61hmq-libguestfs-1.56.2.drv
  /nix/store/7d8smqybvljcp4iad8ri1pld260bmf1v-guestfs-tools-1.52.3.drv
  /nix/store/4dpm3kh022k8r5yc21q95d3l6sp3mc7s-ubuntu-26.04-server-cloudimg-amd64v3.img-nix-vm-test.qcow2.drv
  /nix/store/2xmpk2jvrn8qwm56hh4br9jvzssjfwyi-run-vm-vm.drv
  /nix/store/naiab4d3r9wfqd085gwvs2g0ichk62d4-driver-configuration.json.drv
  /nix/store/slgj89ic22nbpb9k3cjk38dfid6bwkxh-vm-test-ubuntu_26_04.drv