--- a/mercurial/posix.py	Thu Dec 05 13:17:32 2024 +0000
+++ b/mercurial/posix.py	Thu Dec 05 15:16:43 2024 +0000
@@ -300,6 +300,7 @@
             os.close(fh)
             m = os.stat(fn).st_mode
             if m & EXECFLAGS == 0:
+                m = 0o666 & ~umask
                 os.chmod(fn, m & 0o777 | EXECFLAGS)
                 if os.stat(fn).st_mode & EXECFLAGS != 0:
                     if checkisexec is not None: