'How to deploy an exclusive conda package in heroku?

I´m using heroku to deploy a FastApi running in a conda virtual enviroment. I'm have installed all the packages using pip, but there is a package that is exclusive from conda GLPK. I install them using conda install -c conda-forge glpk. When I run pip freeze > requirements.txt this package not appear in the file and not should, because not is possible install whit pip.

Is there a form to deploy this package?



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