# Frequently Asked Build Questions
-This page covers questions about building QMK. If you have not yet you should read the [Build Environment Setup](build_environment_setup.md) and [Make Instructions](make_instructions.md) guides.
+This page covers questions about building QMK. If you have not yet you should read the [Build Environment Setup](getting_started_build_tools.md) and [Make Instructions](make_instructions.md) guides.
## Can't program on Linux
You will need proper permission to operate a device. For Linux users see udev rules below. Easy way is to use `sudo` command, if you are not familiar with this command check its manual with `man sudo` or this page on line.
or just
- $ sudo make <keyboard>-<keymap>-dfu
+ $ sudo make <keyboard>:<keymap>:dfu
But to run `make` with root privilege is not good idea. Use former method if possible.
https://developer.mbed.org/forum/mbed/topic/5205/
-## 'clock_prescale_set' and 'clock_div_1' not available
+## `clock_prescale_set` and `clock_div_1` not available
Your toolchain is too old to support the MCU. For example WinAVR 20100110 doesn't support ATMega32u2.
```