this derivation will be built:
  /nix/store/2mhd7i4vag9bcs8yfh02hh674q4074fw-bcachefs-module-7.0.0-31-generic.drv
building '/nix/store/2mhd7i4vag9bcs8yfh02hh674q4074fw-bcachefs-module-7.0.0-31-generic.drv'...