ocaml - how can we get more recent version of core-kernel and common ppx'es

[Erik]

Hi, I have a project that requires a more recent core-kernel and some of 
the ppx'es (such as ppx_fields_conv).

Being very new to guix I've managed to add/update packages for python 
and ruby stuff, but this ocaml.scm file is quite different. There's a 
lot going on which I'm guessing is related to complexities arising from 
the whole ppx transition that happened in the ocaml ecosystem a few 
years ago, or perhaps just to the somewhat unsynchronized way libraries 
move to new versions of the compiler and libs (just speculating here).

Anyway afaict (with my limited guix-fu) I would either need to duplicate 
a whole lot of packages or somehow reorganize things to share 
definitions where it makes sense. Both those options would require some 
coordination with the people who made the ocaml.scm infrastructure 
first, because clearly there are projects out there that need the 
current set of packages to work like they do now and I don't want to 
just post a huge patch that surprises these people.

Can we get a thread going somewhere on adding a recent version of 
ocaml-core-kernel (for the 4.11.1 ocaml package, possibly bumping that 
to 4.11.2 in the process)?

Best regards,
Erik Lovlie