Build scripts are one of the assumed use cases.
Build scripts are one of the assumed use cases. The other use case is installation scripts. cotowali's installer is written in cotowali itself.
https://github.com/cotowali/konryu
Binary files are different for each architecture, but shell script is not so.
Most scripting languages require a interpreter to be installed. Output of Cotowali is shell script. so no need to install any interpreter.