Hi Shuuichrou, I would have some suggestions/questions: 1. Is it only the ConfigurationManager module which doesn't build or is it also other modules ? For information, '-m Platform/ARM/VExpressPkg/ConfigurationManager/ConfigurationManagerDxe/ConfigurationManagerDxe.inf' allows to build only this module and its dependencies, and '-n 1' allows you to run on one core to have logs following the build order. You can try building modules from other platforms. 2. Is the command working on the edk2's latest master branch ? Or on more recent tags (like edk2-stable202108) 3. Reset the configuration files - Run 'git clean -x Conf/' in edk2/ (assuming you have nothing important there) - Set your environment again to re-create them - Re-build the FVP 4. Rebuild the BaseTools: - cd edk2/BaseTools && make clean && make Regards, Pierre