That thing is like an 11 out of 10 install difficulty. I hate github projects that are really difficult to get working.
I'm using Debian. So many fucking issues. It probably can't work on Debian but I'd really like to know what system people are using who have been successful in getting this to actually work.
Seems there's an issue with the dependencies currently and all versions of installing tortoise-tts from the existing instructions is doomed to failure without manual intervention.
As mikejgrecojr commented in the linked github issue, the fix for running via docker is:
Try updating your Dockerfile by adding in scipy to the conda install and specifying version 1.13.1 on line 31 like below. That worked for me: