The pre-compiled library and hyphenation patterns were stolen from msys2.
See https://packages.msys2.org/package/mingw-w64-x86_64-hyphen?repo=mingw64,
and https://packages.msys2.org/package/mingw-w64-x86_64-hyphen-en?repo=mingw64.
Those packages are re-distributed here without modification in "pkg".
This works, provided a mingw installation and busybox-w32.
Build from the project root using make win/hyp.exe.

P.S.:
tcc would have been used instead if it supported linking to ar archives.
mingw gcc is the only option.