We probably need 2 build config variants
With the nightlies building in stable/beta modes, it came to my mind that we actually also need two versions of the
conda_build_config.yaml file: one that corresponds to the versions of dependencies we'd like to have for the next release and that we use to compile the masters of every package for checking and one that corresponds to the versions of dependencies we had for the last stable release.
If we don't do this separation we'll be recompiling the stable builds (which are not uploaded by default) every night as soon as dependencies change.
In fact, I wonder if we need to keep checking the stable builds once we have released them... @amohammadi: your input would be good here.