AC_MSG_ERROR([ffmpeg is required])
fi
+# jekyll
+AC_CHECK_PROG(JEKYLL, [jekyll], [jekyll])
+if test -z "${JEKYLL}"; then
+ AC_MSG_ERROR([jekyll is required])
+fi
+
+# WOFF2
+AC_CHECK_PROG(WOFF2_COMPRESS, [woff2_compress], [woff2_compress])
+if test -z "${WOFF2_COMPRESS}"; then
+ AC_MSG_ERROR([woff2_compress is required])
+fi
+
# ------------------------------------------------------------------------------
AC_ARG_WITH([systemd],