I have created a color variable font [1] using fully open source tools. But want to make it available in copr. However as per fedora rules for packaging, font must be compiled from source. However my open source toolchain consists of creating a python virtual environment, installing the open source tools like opentypesvg and nanoemoji in that environment and then convert Fontforge sources into a color variable font. However such a workflow is not possible in Fedora. However fonttools ttx files are generated in the process which is XML representation of the binary font file. My question is can ttx format be considered source format? If acceptable then fonts can be generated in a single step using fonttools which is available in Fedora repository. Dr Anirban Mitra 1. https://github.com/mitradranirban/rangeen