default_pre_build      &&
cd ${SOURCE_DIRECTORY} &&
cp ${SCRIPT_DIRECTORY}/singleton.hpp ${SOURCE_DIRECTORY}/simgear/structure/ &&
sedit 's:<boost/pool/detail/singleton.hpp>:<simgear/structure/singleton.hpp>:' \
      ${SOURCE_DIRECTORY}/simgear/structure/Singleton.hxx &&
patch -p1 < $SPELL_DIRECTORY/0001-fix-library-installation-directory.patch