Hi, We build the latest OVMF and found that it doesn't start to build using "OvmfPkg/build.sh -a X64 -n 40" actually. Step: git clone https://github.com/tianocore/edk2.git cd edk2 git submodule init git submodule update -recursive OvmfPkg/build.sh -a X64 -n 40 Then it didn't start to build. log: [vmm@vmm-build edk2]$ OvmfPkg/build.sh -a X64 -n 40 Initializing workspace /home/fan/edk2/BaseTools Loading previous configuration from /home/fan/edk2/Conf/BuildEnv.sh WORKSPACE: /home/fan/edk2 EDK_TOOLS_PATH: /home/fan/edk2/BaseTools CONF_PATH: /home/fan/edk2/Conf [vmm@vmm-build edk2]$ We use the latest commit: 792f0d4f12ad5c01afdf9c92df8c479ff0f19a79, and we found the first commit has such issue is df7c81b5b219c9aee776baa466dd64c9d318dd80. Do you have any advice? Thanks, Fan