this derivation will be built:
  /nix/store/9p9f7dxmlqyncnzashj31ak981ba9fww-bcachefs-module-7.0.0-27-generic.drv
building '/nix/store/9p9f7dxmlqyncnzashj31ak981ba9fww-bcachefs-module-7.0.0-27-generic.drv'...