I have uploaded two Linux builds similar to WebGL:
Sipho 0.91_Nofx Linux Universal Gamma.zip
Sipho 0.91_Nofx Linux Universal.zip
You can find them on main Sipho page. I couldn't figure out how to link them directly on itch. Would you be able to tell us which one works for you? They both have some image effects disabled like WebGL does. And Gamma one uses Gamma rendering (instead of Linear). Thanks!