@andrewnez one smol note: You can use pip wheel to create a "wheelhouse" while keeping the install step separated still!

@andrewnez Hmm, given that layers are just tarballs anyway, I wonder how caching in a layer compares performance wise to caching the cache directly. I guess the image level caching would avoid the cache upload step after each run.

@andrewnez thanks for looking into this. It’s an uphill battle just to get colleagues to care about being a good open source citizen and not downloading all the packages on every build. I can’t imagine the cumulative cost of this waste across all developers.