build_pynac()
{
chmod -R g-w ${PYNACDIR}
cd ${PYNACDIR}
PKG_CONFIG_PATH=${SAGE_LOCAL}/lib/pkgconfig; export PKG_CONFIG_PATH
aclocal
automake --add-missing
autoconf
./configure --disable-static --prefix=${SAGE_LOCAL} --libdir="$SAGE_LOCAL/lib"
$MAKE
if [ $? -ne 0 ]; then