this derivation will be built:
  /nix/store/q91bajwx9xhsg7j5kx2k7xazqb6xb7kj-bcachefs-module-7.0.0-39-generic.drv
building '/nix/store/q91bajwx9xhsg7j5kx2k7xazqb6xb7kj-bcachefs-module-7.0.0-39-generic.drv'...