this derivation will be built:
  /nix/store/f7bx4k70q2axdnxpq7dy6zf8sqdwbpvw-bcachefs-module-7.0.0-39-generic.drv
building '/nix/store/f7bx4k70q2axdnxpq7dy6zf8sqdwbpvw-bcachefs-module-7.0.0-39-generic.drv'...