this derivation will be built:
  /nix/store/aj4rd48py7x5003frqw9fa63vc3a96q3-bcachefs-module-7.0.0-27-generic.drv
building '/nix/store/aj4rd48py7x5003frqw9fa63vc3a96q3-bcachefs-module-7.0.0-27-generic.drv'...