build-essential is already the newest version (12.6). git is already the newest version (1:2.20.1-2+deb10u3). libevent-dev is already the newest version (2.1.8-stable-4). 0 upgraded, 0 newly installed, 0 to remove and 1 not upgraded. $ git submodule update --init $ YGOPRO_LINUX_ALL_STATIC_LIBEVENT_PATH=$PWD/libevent-stable ./premake5 gmake Error: /builds/nanahira/ygopro/gframe/premake4.lua:6: unexpected symbol near '<<' Cleaning up file based variables ERROR: Job failed: exit code 1