these 4 derivations will be built:
  /nix/store/3n32sln5jb5ndwfnw4mshlw7rha1wgac-system-manager.drv
  /nix/store/156v50h0w2g96nzgsfvnkrc17dh5dyk9-closure-info.drv
  /nix/store/apy9kh83k3asfs2ppxpkdv1yplb6kriw-test-script.py.drv
  /nix/store/h9dcssw637is429qkibbcmihznqb21l0-container-test-debian-13-ssh.drv