doesnt seem to work
xdelta3: secondary compression: lzma
xdelta3: source omegaruby.cia source size 1.77 GiB [1898568000] blksize 2.00 MiB window 64.0 MiB
xdelta3: target window checksum mismatch: XD3_INVALID_INPUT
xdelta3: normally this indicates that the source file is incorrect
xdelta3: please verify the source file with sha1sum or equivalent
xdelta3: secondary compression: lzma
xdelta3: source omegaruby.cia source size 1.77 GiB [1898568000] blksize 2.00 MiB window 64.0 MiB
xdelta3: target window checksum mismatch: XD3_INVALID_INPUT
xdelta3: normally this indicates that the source file is incorrect
xdelta3: please verify the source file with sha1sum or equivalent