this derivation will be built:
  /nix/store/k6yaa859j16ymi6az5wd148l0wx408hh-bcachefs-module-7.0.0-38-generic.drv
building '/nix/store/k6yaa859j16ymi6az5wd148l0wx408hh-bcachefs-module-7.0.0-38-generic.drv'...