3 ## Build Environment Setup
6 What these instructions look like depends on whether NoahAndrews's setup scripts get merged
9 If you're using [homebrew,](http://brew.sh/) you can use the following commands:
11 brew tap osx-cross/avr
13 brew install dfu-programmer
15 This is the recommended method. If you don't have homebrew, [install it!](http://brew.sh/) It's very much worth it for anyone who works in the command line.
17 You can also try these instructions:
19 1. Install Xcode from the App Store.
20 2. Install the Command Line Tools from `Xcode->Preferences->Downloads`.
21 3. Install [DFU-Programmer][dfu-prog].
26 If you have any problems building the firmware, you can try using a tool called Vagrant. It will set up a virtual computer with a known configuration that's ready-to-go for firmware building. OLKB does NOT host the files for this virtual computer. Details on how to set up Vagrant are in the [VAGRANT_GUIDE file](VAGRANT_GUIDE.md).