Sourcemod Extensions Compiler choice master or 1.12-dev branch equals API8 - API9 core default last master run container git clone ext repo to root, example soundlib move to /soundlib create build folder: mkdir build && cd build compile commands examples: python3 ../configure.py --hl2sdk-root=/ --mms-path=/mmsource --sm-path=/sourcemod --hl2sdk-manifest-path /sourcemod/hl2sdk-manifests --enable-optimize --targets x86_64 --sdks tf2 --no-plugins python3 ../configure.py --hl2sdk-root=/ --mms-path=/mmsource --sm-path=/sourcemod/ -s present --enable-optimize --targets x86_64 --sdks tf2 python3 ../configure.py --enable-optimize --targets x86,x86_64 python3 ../configure.py --hl2sdk-root=/ --mms-path=/mmsource --sm-path=/sourcemod/ -s present --enable-optimize --targets x86,x86_64 --sdks tf2 ambuild move from container to host: docker cp sm_ext_build_v13_off:/SMExt-TF2Items/build/package/ ./