Hi, About RStudio, Ricardo and other did some work in this channel: https://github.com/BIMSBbioinfo/guix-bimsb
I did used long time ago (I mean months ago ;-) So I am not sure about the current status. Well, this channel is the entry point, IMHO, about RStudio and other "bioinfo" packages not yet in (master) Guix. Hope that helps. simon