SAGE_SPKG_CONFIGURE(
    [jmol], [dnl direct testing of file existence
      AC_MSG_CHECKING(JSmol installation...)
      if [[ -f %%LOCALBASE%%/www/JSmol/JSmol.lite.js ]] ; then
        AC_MSG_RESULT(OK)
      else
        AC_MSG_RESULT(KO)
        sage_spkg_install_jmol=yes
      fi
])