Far too high a proportion of the questions in #ruby are about installation.
Often people come in having (naturally) tried to install it from their distro's package manager. First we have to explain to them why this is a bad idea and persuade them to remove it. Then, often they have tried to install it from source, passing some fucked up value to --prefix, and they have to be helped to clean that mess up.
Then we tell them to use rvm, but someone pipes up about rbenv and friends and we have to explain the differences. Then it turns out that they didn't have openssl-dev or something installed so they have to recompile ruby again, or someone has to try and remember the magic spell to compile the openssl bit of ruby separately, which nobody ever can.
THEN it turns out that all they want to do with ruby is run redmine, which has some other specific requirements that nobody in the channel knows or cares about.
Basically, when yehuda katz finishes that project of his, freenode will be measurably happier, although the problems with OS packages will remain, I imagine forever.
The real root of the problem is that a lot of the things which make the ruby ecosystem highly dysfunctional are the same things that make it so great. Primarily the fast pace.