default_pre_build     &&
 cd $SOURCE_DIRECTORY &&
 if is_depends_enabled $SPELL python;then
   ln -s /usr/bin/python2 python
 fi
 if is_depends_enabled $SPELL python3;then
   ln -s /usr/bin/python3 python
 fi 
patch -p1 < $SPELL_DIRECTORY/icu.patch

.