Thanks to @daviwil's stream I finally allocated time to start migration to more complete REPL-driven workflow for #guix and #rde development.
It still requires a lot of work to make it really pleasant, but I already build store items for different parts of rde from repl rather than makefiles, which is a way faster (in terms of build time, the required amount of code is not that small yet).
https://guix.gnu.org/manual/devel/en/html_node/The-Store-Monad.html
@abcdw Nice! It is pretty convenient building derivations at the REPL.
The one thing I really need to figure out is how to quickly open the output file or folder of a build in Emacs so that I can inspect it without copy/pasting the path.
Probably not that hard to do, just needs a few moments to try it!