--- a/.hgignore
+++ b/.hgignore
@@ -13,6 +13,7 @@ tests/annotated
 tests/*.err
 build
 dist
+Output/Mercurial-[0-9.]*.exe
 doc/*.[0-9]
 doc/*.[0-9].gendoc.txt
 doc/*.[0-9].{x,ht}ml