this derivation will be built:
  /nix/store/fnndb8fxzg40v7z5kn77kb2wvg36xsj6-bcachefs-module-7.0.0-39-generic.drv
building '/nix/store/fnndb8fxzg40v7z5kn77kb2wvg36xsj6-bcachefs-module-7.0.0-39-generic.drv'...