buildx failed with: ERROR: failed to solve: process "/bin/sh -c mkdir $SPACK_ROOT && cd $SPACK_ROOT && git init --quiet && git remote add origin https://github.com/spack/spack.git && git fetch --depth=1 origin refs/heads/cicd && git checkout --detach FETCH_HEAD && mkdir -p $SPACK_ROOT/opt/spack" did not complete successfully: exit code: 128