I got v0.1.1a from here. And since you asked, I've looked into it a bit, and it was caused by unren. There is a specific type of displayable it doesn't like and can't decompile correctly. Then it leaves the half-decompiled rpy files behind, for some reason. So when that happens, I must delete the generated .rpy files and try another method. But it seems I missed deleting dorms.rpy, where the missing label is.
The reason I decompile is that I have a script that finds and deletes some things, like "pause=hard" and "{w}" and stuff like that.
Anyway, found the cause and it was my own damn fault