Compiling SOX for AWS

docker run --name make_sox -it lambci/lambda:build bash 

Then start a new terminal on host:

docker cp build_sox make_sox:/var/task/build_sox

In docker:

chmod +x build_sox/*
mv build_sox/* ./
./static_mpeg.sh
./static_lame.sh
./static_sox.sh

In host:

docker cp make_sox:/usr/sox-14.4.2/bin/sox sox

now you have a sox binary in your current directory that you can run in a lambda.