this derivation will be built:
  /nix/store/myx6xwzvgj2qz5gdvrblq4c1q452vi7h-bcachefs-module-7.0.0-29-generic.drv
building '/nix/store/myx6xwzvgj2qz5gdvrblq4c1q452vi7h-bcachefs-module-7.0.0-29-generic.drv'...