diff --git a/livecd-tools.spec b/livecd-tools.spec
index e909c38..da1b6c2 100644
--- a/livecd-tools.spec
+++ b/livecd-tools.spec
@@ -3,7 +3,7 @@
 Summary:	Tools for building live CDs
 Name:		livecd-tools
 Version:	21.1
-Release:	39
+Release:	40
 Epoch:		1
 License:	GPLv2+
 Group:		System/Base
diff --git a/urpmi-bootstrapper.sh b/urpmi-bootstrapper.sh
index 5436529..88b0837 100755
--- a/urpmi-bootstrapper.sh
+++ b/urpmi-bootstrapper.sh
@@ -31,7 +31,7 @@ urpmi_bootstrap(){
 # This will validate that all requested packages do exist
 # and will print a list of not existing ones.
 # Returns 0 only if all packages do exist.
-urpmq --sources --urpmi-root "$urpmiRoot" ${packagesList}
+urpmq --whatprovides --urpmi-root "$urpmiRoot" ${packagesList} >/dev/null
 
 # temporarily don't fail the whole scripts when not last iteration of urpmi fails
 set +e