I have posted a quick update for the build instructions: wiki.synfig.org/wiki/index.php?t … ldid=17335
Also, please include python3 into installation. In win32 case synfig will be looking for python binary in INSTALL_PREFIX/python/python.exe or INSTALL_PREFIX/python/python3.exe
(see this commit for details: github.com/synfig/synfig/commit … 141b1f5d9c )
I think it’s best to use precompiled portable build of python in this case: portablepython.com/wiki/Download
Cheers!