I compiled blender with Lzma on, but when I check "compress file" while saving, it currently compresses with gzip (zlib).

Is there a special compile option to change it? Or can I do a save script in python that compress/decompress to/from lzma (without writing to the HDD).

I'm working on very big files and Lzma2 (tested by compressing to .xz with linux) is between 2x and 3x smaller and not much slower because multi threaded.