What problem does this solve?

What problem does this solve?

Build on the same branch or PR start using the cache and then fail when conda tries to install. See

https://circleci.com/gh/Titan-C/sphinx-gallery/11

I see, they are caching the miniconda install. Not sure I am a big fan of the idea, I'd rather remove ~/miniconda from the cache.

I see, they are caching the miniconda install. Not sure I am a big fan of the idea, I'd rather remove ~/miniconda from the cache.

I see the cache is because one downloads a lot. Comparing timings for us downloading conda with mayavi and mkl + install takes a little more than a minute. For MNE-Python they need 3 min to recover their cache which includes more than the conda install. I'm fine with dropping the cache

It's a bit weird, but building without saving cache breaks the build because cache was already there. I'm rebuilding from CircleCi to clean everything

Let's merge this one thanks!