Get Visual Studio to run a T4 Template on every build

Question

How do I get a T4 template to generate its output on every build? As it is now, it only regenerates it when I make a change to the template.

I have found other ques

Answer 1

Some guy built a nuget package for this.

Side note: I get compile errors from both TextTemplate.exe and that package (because that package calls TextTemplate.exe) but not from Visual Studio. So apparently the behavior is not the same; heads up.

EDIT: This ended up being my problem.