Without avr-libc the build fails trying to #include_next a header from the standard library, which of course doesn't exist.
3. Install [DFU-Programmer][dfu-prog].
### Linux
-Install AVR GCC and dfu-progammer with your favorite package manager.
+Install AVR GCC, AVR libc, and dfu-progammer with your favorite package manager.
Debian/Ubuntu example:
sudo apt-get update
- sudo apt-get install gcc-avr dfu-programmer
+ sudo apt-get install gcc-avr avr-libc dfu-programmer
### Vagrant
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).
## Troubleshooting
1. Try running `make clean` if the make command fails.
- WIP
\ No newline at end of file
+ WIP