@oldpaint said in gcc 9.4 compiler in docker images: I thought I would start with the Botan library so I ran the command 'clickable build --libs --verbose' and that provoked a download of the correct docker container for my phone, arm64. I can't seem to provoke a download for the desktop docker container, amd64. I tried 'clickable desktop ...' but no joy. You could try 'CLICKABLE_ARCH=amd64 clickable build --libs --verbose' or 'clickable build --arch amd64 --libs --verbose' in order to specify the architecture. Your architecture should also be defined in your manifest.json file. (The app template should provide a manifest.json file by default. It is maybe under data/. You can read about it here: https://clickable-ut.dev/en/latest/usage.html ) The architecture will probably be whatever architecture is specified when executing clickable (likely arm64 by default).