SAGE_SPKG_CONFIGURE([chardet], [
sage_spkg_install_chardet=yes
], [dnl REQUIRED-CHECK
AC_REQUIRE([SAGE_SPKG_CONFIGURE_TOX])
dnl chardet is only needed when we cannot use system tox.
AS_VAR_SET([SPKG_REQUIRE], [$sage_spkg_install_tox])
])
