--- a/make/SourceRevision.gmk	Mon Nov 28 10:13:18 2016 +0100
+++ b/make/SourceRevision.gmk	Mon Nov 28 15:19:08 2016 +0100
@@ -119,8 +119,7 @@
 	exit 2
 
     create-source-revision-tracker:
-	$(call LogWarn, Error: No mercurial configuration present and no .src-rev)
-	exit 2
+	$(call LogWarn, Warning: No mercurial configuration present and no .src-rev)
   endif
 
 endif