Dear all, A bug was identified in gem5 v20.1 that resulted in gem5 failing to compile with scons 4.0.1 and 4.1.0: https://gem5.atlassian.net/browse/GEM5-916 As such a hotfix (v20.1.0.4) has been released. This fix can be obtained by pulling the latest version of gem5 via the git stable branch. The fix will ensure gem5 functions correctly on the latest scons release. Special thanks to Hoa Nguyen for finding and fixing this bug! Dr. Bobby R. Bruce Room 2235, Kemper Hall, UC Davis Davis, CA, 95616 web: https://www.bobbybruce.net