use build timestamp as version qualifier
diff --git a/releng/org.eclipse.xpand.releng/releng/xpand-build.properties b/releng/org.eclipse.xpand.releng/releng/xpand-build.properties
index e79c550..b49c5e1 100644
--- a/releng/org.eclipse.xpand.releng/releng/xpand-build.properties
+++ b/releng/org.eclipse.xpand.releng/releng/xpand-build.properties
@@ -5,8 +5,8 @@
buckminster.temp.root=${workspace.root}/temp
# define the qualifier replacement method
-qualifier.replacement.*=generator:lastModified
-generator.lastModified.format='v'yyyyMMddHHmm
+qualifier.replacement.*=generator:buildTimestamp
+generator.buildTimestamp.format='v'yyyyMMddHHmm
target.os=*
target.ws=*
