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# immutability posts

## Dapper Build tool: consistent builds with docker

This articles shows how to use the dapper build tool from Rancher Labs. The basic idea is to use Docker containers, copy* your source files into the container environment, then compile, then copy the build artefacts out. (* on Linux you can also use the mount mode to avoid copying the files.) How to use it: you start by installing Go so you can compile Dapper. I know, I know, but if you will humor me, I will convince you that Go is the last programming language compiler you will need to install on your host.