Have you seen this error?

building the system configuration...
error: flake 'git+file:///Users/matt/nixfiles' does not provide attribute 'packages.aarch64-darwin.darwinConfigurations.Bebop.system', 'legacyPackages.aarch64-darwin.darwinConfigurations.Bebop.system' or 'darwinConfigurations.Bebop.system'

I ran into this and it took me about a month before I realized that I had changed my hostname and that is why my nix flake was no longer building.

Background: I had some projects from school that I wanted to revisit and compile again, specifically a game called Worm. This was an assignment that needed to be linked against ncurses which isn’t installed out of the box on most machines. I’ve been dual booting NixOS for some time now on my gaming PC and I thought it was time to start using Nix Flakes with my own projects.

How I cross compiled Go to run on the Winkhub and installed a custom web app to control the lights locally.

TL;DR; Be sure to compile with Go 1.5 with the following settings:
GOOS=linux GOARCH=arm GOARM=5 go build .

This post picks up where part 1 left off. Here is some of the troubleshooting I had to go through since following the instructions did not go smoothly for me.

How I liberated my Winkhub from the Cloud

TL;DR; I rooted my Winkhub over the UART connection and then wrote a small Go web service to allow me to turn my lights on and off from my phone.

This post covers how to setup CoreOS with iptables on DigitalOcean. It also covers how to start a Docker container using systemd to keep the container running after crashes and reboots.