Fix MSI creation with Python 3.10.

packaging/createmsi.py

diff --git a/packaging/createmsi.py b/packaging/createmsi.py
index 72ac450..599e607 100755
--- a/packaging/createmsi.py
+++ b/packaging/createmsi.py
@@ -173,6 +173,8 @@
                       pyinstaller_tmpdir]
         for m in modules:
             pyinst_cmd += ['--hidden-import', m]
+        # https://github.com/pyinstaller/pyinstaller/issues/5693
+        pyinst_cmd += ['--exclude-module', '_bootlocale']
         pyinst_cmd += ['meson.py']
         subprocess.check_call(pyinst_cmd)
         shutil.move(pyinstaller_tmpdir + '/meson', main_stage)