Hello I am not sure if this has been discussed before, but bugs like: https://bugs.gentoo.org/show_bug.cgi?id=589990 Reminds me that it's a real problem that we can only check for kernel options being rights for *installed* packages only if we try to re-emerge them. I was thinking about if it would be possible to always check for that requirements when, for example, updating the system with the standard "emerge -avuDN world" (or maybe with an additional option that we could simply append to that for people wanting to save time). I am not sure if maybe a way to do that would be to run pkg_pretend for all installed packages (not only the ones that will be installed with the update)... if that is the case, I think that probably a new option would fit better :/ What do you think? Thanks a lot for your thoughts for trying to resolve this :|