Hello,

I hope you are well!

I've been trying to build an r package for two days now. 

When I initially ran `guix build` I got an error message indicating that there was no code for a specific guile module, which I managed to work around by using %load-path.

After adding GUILE_LOAD_PATH and running `guix build ` again, I get this message: guix build: error: r-oenb: unknown package,  and I can't seem to grasp the reason because I have already added the package definition to gnu/packages/cran.scm.

Any assistance you can provide would be greatly appreciated.

Regards,

Dan