this derivation will be built:
  /nix/store/ca42w1mlzvjvhnr6hq59yqxkbryfqc46-bcachefs-module-7.0.0-28-generic.drv
building '/nix/store/ca42w1mlzvjvhnr6hq59yqxkbryfqc46-bcachefs-module-7.0.0-28-generic.drv'...