these 8 derivations will be built:
  /nix/store/061iadyx68ws0iw0a7crcxrf00kkwkx6-spaces-probe-ok.drv
  /nix/store/3631svjdcgrk716h4v3a23hw9n9c7yxs-spaces-probe-failing.drv
  /nix/store/6aa6migjnjbyqg36bsr220lrbhx8hyhi-spaces-probe-notifying-timed.drv
  /nix/store/9gqvv5hlmm0wvkmp0rv6z7ndgk5p77ff-spaces-probe-reason.drv
  /nix/store/kdipb2llaa3yzq0xa00si3i9niwks1q1-spaces-probe-notifying.drv
  /nix/store/mlvppnlj3i17mcadavgnhq9zyn1igcz2-spaces-probe-notifying-fail.drv
  /nix/store/vzzgpxsda5d74zkyzs7ls0il51gp87yn-spaces-probe-reason-ok.drv
  /nix/store/7slfxr8i0bsdzqhlidmwnwlz67731fjh-spaces-command-wrapper-test.drv