it's a common problem for all of our preprocessor techs but until you specify `bem@0.8.0` and `roole@0.9.0` in project's dependencies it's kinda guaranteed to work fine. so I don't think it's rather big problem to add preprocessors into `peerDependencies` of `bem-tools`. and as soon as we have quite a few of such techs it's possible to release updates in almost no time.