this derivation will be built:
  /nix/store/sahk81gn9a55k5brhz9q2r88h8m9np6s-bcachefs-module-7.0.0-39-generic.drv
building '/nix/store/sahk81gn9a55k5brhz9q2r88h8m9np6s-bcachefs-module-7.0.0-39-generic.drv'...