diff --git a/contrib/examples/fix.hgrc b/contrib/examples/fix.hgrc
--- a/contrib/examples/fix.hgrc
+++ b/contrib/examples/fix.hgrc
@@ -1,9 +1,9 @@
 [fix]
 clang-format:command = clang-format --style file
-clang-format:pattern = set:(**.c or **.cc or **.h) and not "include:contrib/clang-format-ignorelist"
+clang-format:pattern = set:(rootglob:**.c or rootglob:**.cc or rootglob:**.h) and not "include:contrib/clang-format-ignorelist"
 
 rustfmt:command = rustfmt
-rustfmt:pattern = set:**.rs
+rustfmt:pattern = set:rootglob:**.rs
 
 black:command = black --config=black.toml -
-black:pattern = set:**.py - mercurial/thirdparty/** - "contrib/python-zstandard/**"
+black:pattern = set:rootglob:**.py - rootglob:mercurial/thirdparty/** - "rootglob:contrib/python-zstandard/**"