--- a/contrib/examples/fix.hgrc	Wed Sep 30 18:07:21 2020 +0530
+++ b/contrib/examples/fix.hgrc	Thu Oct 01 09:09:35 2020 -0700
@@ -3,7 +3,7 @@
 clang-format:pattern = set:(**.c or **.cc or **.h) and not "include:contrib/clang-format-ignorelist"
 
 rustfmt:command = rustfmt +nightly
-rustfmt:pattern = set:**.rs
+rustfmt:pattern = set:"**.rs" - "mercurial/thirdparty/**"
 
 black:command = black --config=black.toml -
 black:pattern = set:**.py - mercurial/thirdparty/**