this derivation will be built:
  /nix/store/j5qhiqkjkym9r50zk9gsaqr48vnxy6q9-bcachefs-module-7.0.0-29-generic.drv
building '/nix/store/j5qhiqkjkym9r50zk9gsaqr48vnxy6q9-bcachefs-module-7.0.0-29-generic.drv'...