this derivation will be built:
  /nix/store/n81bpk8a9w7rdj0w2fp9x30ly1aa1nkl-bcachefs-module-7.0.0-39-generic.drv
building '/nix/store/n81bpk8a9w7rdj0w2fp9x30ly1aa1nkl-bcachefs-module-7.0.0-39-generic.drv'...