this derivation will be built:
  /nix/store/mvvm9x8a2a7wvz5dxqhnv238wlf86yq9-bcachefs-module-7.0.0-27-generic-64k.drv
building '/nix/store/mvvm9x8a2a7wvz5dxqhnv238wlf86yq9-bcachefs-module-7.0.0-27-generic-64k.drv'...