@ramin_hal9001 but Guile isn't r7rs compliant, even with (install-r7rs!) theres lots of idiosyncracies about Guile that makes it non-portable, so it shouldn't be the bar of portability between r7rs implementations.

that being said, #akku does a lot of tree shaking to make guile libraries work with r6rs and r7rs implementations. its currently a bit hit or miss, but does a fairly good job in my experience. if you packaged it for akku, I bet it could work given Weinholt's knowledge of the distinctions.

Also: Gambit is r4rs, loko is r6rs, and I don't think Larceny is still maintained. Chibi is an actively maintained r7rs tho. but Akku should help with the interop between r6/r7rs implementations.