Add r-base version 3.5.0 to Linux aarch64 about r-base-feedstock

[mfansler]

Maybe I can answer this myself. Seeing an unsatisfiable dependency ending with r-base=3.5 is likely an artifact of the order of the path that the solver traverses when trying to find a solution. At least, that's the empirical sense I get after having seen this many times. The solver seems to first eliminate newer version combinations and ultimately reports the last thing it tried, which is a very old version. I expect that adding an r-base=3.5 will not solve the problem, so, I'm going to close this.

However, I'd be happy to help with the actual problem - please add more details or link to where you are attempting a specific build. I'd recommend trying to manually create the failing environment using a newer Mamba/Micromamba - those tend to give better dependency conflict reports in my experience.

[mfansler]

Why such an old version? Other than pure R packages, no other packages would be available. Please elaborate why R 3.6 (which has linux-aarch64 builds) is not sufficient.