Some platforms put it at include/zopfli.h, while some at include/zopfli/zopfli.h
Rather than hard-coding zopfli/zopfli.h in zopfli.pxd, might be better to remove the prefix and handle it instead in setup.py customizebuild* just like others (e.g. jxrlib).
Some platforms put it at include/zopfli.h, while some at include/zopfli/zopfli.h
Rather than hard-coding zopfli/zopfli.h in zopfli.pxd, might be better to remove the prefix and handle it instead in setup.py customizebuild* just like others (e.g. jxrlib).