Making a native Linux version shouldn't have any major technical roadblocks, there are no Windows-only dependencies for example. It's just a question of time, particularly the on-going QA time. I'm already spread very thin so I haven't attempted it. The devil is in the details.
Fleshcult is a Python program - there's no compiling involved. I use PyCharm for an IDE, but that's not especially relevant here, you could use any Python IDE.