FWIW I was mainly using --binary to avoid unnecessarily installing the build-deps of my package deps

oh… the amount of irrelevant packages installed is much less alarming if I use the racket/racket:7.7-full image instead of the minimal one I guess most of the time people are working with a full install and don’t notice this behaviour very much

Yep, that’s one of the primary reasons why it’s recommended for docker. But the version thing is no fun.