Variable in template include?

The following syntax doesn’t seem to work in a template - the file never gets included.

What am I doing wrong? Is this not possible?

{% include “{{ clean_app_name }}.inputs.conf.j2” ignore missing %}

I’ve tried single quotes, no quotes, nothing seems to work.

this is really a jinja2 question, the answer is no mustaches:

{% include clean_app_name + ".inputs.conf.j2" ignore missing %}