this derivation will be built:
  /nix/store/7f9jf0m7n1hvg7zpvmshxf0vy381la7w-bcachefs-module-7.0.0-38-generic.drv
building '/nix/store/7f9jf0m7n1hvg7zpvmshxf0vy381la7w-bcachefs-module-7.0.0-38-generic.drv'...