Nix is a tool for configuring software environments according to source files. I’ve been hearing more and more about Nix on Hacker News and Twitter. The idea of it appeals to me, so I’ve been tinkering with it over the past few weeks. My history with infrastructure as code Ten years ago, I discovered Salt, a tool that allows you to define a computer system’s configuration in source code. I loved the idea of a git repo that defined what services were installed on my computers and VMs.