pkg:setup
./buildconf.sh --force
args = %W[--disable-debug --disable-dependency-tracking --prefix=#{prefix} --with-png=#{Formula["libpng"].opt_prefix} ]
args << "--with-zlib=#{MacOS.sdk_path}/usr" if MacOS.sdk_path_if_needed
pkg:configure *args
make DESTDIR=${PKG_DEST} install