diff --git a/cmsBuild b/cmsBuild
index 95d7718..cb18182 100755
--- a/cmsBuild
+++ b/cmsBuild
@@ -2547,6 +2547,8 @@ class Package(object):
         checksumCalculator.addStrings(PKGFactory.sectionPreambles.values())
         checksumCalculator.addStrings(list(PKGFactory.sectionPostambles.values()) + [self.installPostambles])
 
+        if self.versionSuffix and (self.options.tag == "hash"):
+            checksumCalculator.addString("force rebuild")
         if self.name in cms_debug_packages:
             checksumCalculator.addString("cms_debug_packages=%s" % ",".join(sorted(cms_debug_packages[self.name])))
 
@@ -3883,6 +3885,8 @@ def checkDeps(pkg, requires, scheduler):
                 if p == pkg_name: continue
                 found[p] = 1
     print("Missing ",pkg.name,missing)
+    if missing:
+        raise RpmBuildFailed(pkg)
     scheduler.log("Done checking package dependencies: %s" % pkg.pkgName())
     return