A new SCons release, 4.9.1, is now available on the SCons download page: https://scons.org/pages/download.html Here is a summary of the changes since 4.9.0: FIXES ----- - New CacheDir initialization code failed on Python 3.7 for unknown reason (worked on 3.8+). Adjusted the approach a bit. Fixes #4694. - Fixed a hang in `wait_for_process_to_die()` on Windows, affecting clean-up of the SCons daemon used for Ninja builds. Thanks to the following contributors listed below for their contributions to this release. ================================================================= git shortlog --no-merges -ns 4.9.0..HEAD 7 Mats Wichmann 4 William Deegan 2 Adam Simpkins