setuptools_scm insists on writing to the version_file during the build;
we don't want it to do that.

---
 pyproject.toml |    2 --
 1 file changed, 2 deletions(-)

--- a/pyproject.toml
+++ b/pyproject.toml
@@ -117,8 +117,6 @@ archs = ["x86", "AMD64", "ARM64"]
 
 
 [tool.setuptools_scm]
-version_file = "mercurial/__version__.py"
-
 # this use `<last-tag>.post1.dev<distance>
 #
 # To restore the format introduced for 6.9 nightly build we would need to be