buildx failed with: ERROR: failed to solve: process "/bin/sh -c . \"/work/emsdk/emsdk_env.sh\" && cd /work/c-toxcore && emcmake cmake -B_build -H. -GNinja -DCMAKE_INSTALL_PREFIX:PATH=\"/usr/local\" -DCMAKE_C_FLAGS=\"-O3 -flto -fPIC\" -DBUILD_TOXAV=OFF -DENABLE_SHARED=OFF -DBOOTSTRAP_DAEMON=OFF -DMIN_LOGGER_LEVEL=DEBUG && emmake cmake --build _build --parallel 8 --target install" did not complete successfully: exit code: 1