diff --git a/cmsBuild b/cmsBuild
index 9321761..6709d33 100755
--- a/cmsBuild
+++ b/cmsBuild
@@ -2632,6 +2632,9 @@ class Package(object):
         if self.buildOptions:
             checksumCalculator.addStrings(self.buildOptions)
 
+        if self.versionSuffix and (self.options.tag == "hash"):
+            checksumCalculator.addString("force rebuild test1")
+
         if self.name in self.options.forceBuild:
             checksumCalculator.addStrings("ForceBuild: %s" % time())