I've been using mina (https://github.com/mina-deploy/mina) for deployments, and overall it's pretty great. However, I just tried to create this column type migration and it just blew right past it in the deployment. I'm going to see if I can file a bug about it.
I went ahead and ran the migration manually, which blows, but hopefully I'll get this resolved.
On the plus side, I can now write more in my posts.