Docker Container No Space Left On Device

Hi, I'm evaluating Space and I've setup a space.kts to build my source from a docker image that I placed in my package repo. I get a "No space left on device" error about half way through my build. The repo + image + build folder when complete should about 4.5GB total and the free tier is supposed to support 10 GB. Does anyone have any idea why this happens? I'm getting no other warnings anywhere about running out of disk space.