this derivation will be built:
  /nix/store/i7h6vccrb191c2wd89kzjzhgzj6r8qrq-bcachefs-module-7.0.0-38-generic-64k.drv
building '/nix/store/i7h6vccrb191c2wd89kzjzhgzj6r8qrq-bcachefs-module-7.0.0-38-generic-64k.drv'...