diff --git a/Makefile b/Makefile
index d75dbac..6987751 100644
--- a/Makefile
+++ b/Makefile
@@ -10,6 +10,7 @@ noroot:
 	if test $$UID = 0; then echo "don't build as root!"; exit 1; fi
 
 members.xml:
+	test -e /usr/bin/ceoquery || (echo 'Erorr: ceoquery not found'; exit 1)
 	echo '<?xml version='\''1.0'\''?>' > $@
 	echo '<memberlist>' >> $@
 	ceoquery memberlist | sort | awk -F \| '{ name = $$1; program = $$2; userid = $$3; gsub(/&/, "\\&amp;", name); gsub(/&/, "\\&amp;", program); gsub(/"/, "\\&quot;", name); gsub(/"/, "\\&quot;", program); print "<member name=\"" name "\" program=\"" program "\" userid=\"" userid "\" />"; }' >> $@