small improvements
diff --git a/org.eclipse.wtp.releng.webupdatesite/build-home/createDigests.xml b/org.eclipse.wtp.releng.webupdatesite/build-home/createDigests.xml
index 25d6f70..3ce6222 100644
--- a/org.eclipse.wtp.releng.webupdatesite/build-home/createDigests.xml
+++ b/org.eclipse.wtp.releng.webupdatesite/build-home/createDigests.xml
@@ -35,20 +35,20 @@
             <arg
                 line="-application org.eclipse.update.core.siteOptimizer" />
             <arg
-                line="-digestBuilder -digestOutputDir=${updateSite} -siteXML=${updateSite}/${mainSiteFileName}" />
+                line="-digestBuilder -digestOutputDir=${update.site} -siteXML=${update.site}/${mainSiteFileName}" />
         </java>
 
     </target>
 
     <target name="checkArgs">
-        <fail message="eclipse.home and updateSite must be set.">
+        <fail message="eclipse.home and update.site must be set.">
             <condition>
                 <and>
                     <not>
                         <isset property="eclipse.home" />
                     </not>
                     <not>
-                        <isset property="updateSite" />
+                        <isset property="update.site" />
                     </not>
                 </and>
             </condition>