this derivation will be built:
  /nix/store/84km0qx6jhzmrkm81riq21dhinn1ha1x-bcachefs-module-7.0.0-39-generic.drv
building '/nix/store/84km0qx6jhzmrkm81riq21dhinn1ha1x-bcachefs-module-7.0.0-39-generic.drv'...