To ensure you are always up to date, you can just run `sudo util/install_dependencies.sh`. That should always install all the dependencies needed. **This will run `apt-get upgrade`.**
You can also install things manually, but this documentation might not be always up to date with all requirements.
The current requirements are the following, but not all might be needed depending on what you do. Also note that some systems might not have all the dependencies available as packages, or they might be named differently.
```
build-essential
gcc
unzip
wget
zip
gcc-avr
binutils-avr
avr-libc
dfu-programmer
dfu-util
gcc-arm-none-eabi
binutils-arm-none-eabi
libnewlib-arm-none-eabi
git
```
Install the dependencies with your favorite package manager.
If you're on [NixOS](https://nixos.org/), or have Nix installed on Linux or macOS, run `nix-shell` from the repository root to get a build environment.
By default, this will download compilers for both AVR and ARM. If you don't need both, disable the `avr` or `arm` arguments, e.g.:
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. Note that the `make` and `make install` portion during the homebrew installation of avr-libc can take over 20 minutes and exhibit high CPU usage.
If you have Windows 10 with Creators Update or later, you can build and flash the firmware directly. Before the Creators Update, only building was possible. If you don'thave it yet or if are unsure, follow [these instructions](https://support.microsoft.com/en-us/instantanswers/d4efb316-79f0-1aa1-9ef3-dcada78f3fa0/get-the-windows-10-creators-update).
In addition to the Creators Update, you need Windows 10 Subystem for Linux, so install it following [these instructions](http://www.howtogeek.com/249966/how-to-install-and-use-the-linux-bash-shell-on-windows-10/). If you already have the Windows 10 Subsystem for Linux from the Anniversary update it's recommended that you [upgrade](https://betanews.com/2017/04/14/upgrade-windows-subsystem-for-linux/) it to 16.04LTS, because some keyboards don't compile with the toolchains included in 14.04LTS. Note that you need to know what your are doing if you chose the `sudo do-release-upgrade` method.
You will need to clone the repository to your Windows file system using the normal Git for Windows and **not** the WSL Git. So if you haven't installed Git before, [download](https://git-scm.com/download/win) and install it. Then [set it up](https://git-scm.com/book/en/v2/Getting-Started-First-Time-Git-Setup), it's important that you setup the e-mail and user name, especially if you are planning to contribute.
Once Git is installed, open the Git Bash command and change the directory to where you want to clone QMK; note that you have to use forward slashes, and that your c drive is accessed like this `/c/path/to/where/you/want/to/go`. Then run `git clone --recurse-submodules https://github.com/qmk/qmk_firmware`, this will create a new folder `qmk_firmware` as a subfolder of the current one.
The Toolchain setup is done through the Windows Subsystem for Linux, and the process is fully automated. If you want to do everything manually, there are no other instructions than the scripts themselves, but you can always open issues and ask for more information.
1. Open "Bash On Ubuntu On Windows" from the start menu.
2. Go to the directory where you cloned `qmk_firmware`. Note that the paths start with `/mnt/` in the WSL, so you have to write for example `cd /mnt/c/path/to/qmk_firmware`.
* You can run `util/wsl_install.sh` again to get all the newest updates.
* Your QMK repository need to be on a Windows file system path, since WSL can't run executables outside it.
* The WSL Git is **not** compatible with the Windows Git, so use the Windows Git Bash or a windows Git GUI for all Git operations
* You can edit files either inside WSL or normally using Windows, but note that if you edit makefiles or shell scripts, make sure you are using an editor that saves the files with Unix line endings. Otherwise the compilation might not work.
1. If you have ever installed WinAVR, uninstall it.
2. Install [MHV AVR Tools](https://infernoembedded.com/sites/default/files/project/MHV_AVR_Tools_20131101.exe). Disable smatch, but **be sure to leave the option to add the tools to the PATH checked**.
3. If you are going to flash Infinity based keyboards you will need to install dfu-util, refer to the instructions by [Input Club](https://github.com/kiibohd/controller/wiki/Loading-DFU-Firmware).
4. Install [MinGW](https://sourceforge.net/projects/mingw/files/Installer/mingw-get-setup.exe/download). During installation, uncheck the option to install a graphical user interface. **DO NOT change the default installation folder.** The scripts depend on the default location.
5. Clone this repository. [This link will download it as a zip file, which you'll need to extract.](https://github.com/qmk/qmk_firmware/archive/master.zip) Open the extracted folder in Windows Explorer.
6. Open the `\util` folder.
7. Double-click on the `1-setup-path-win` batch script to run it. You'll need to accept a User Account Control prompt. Press the spacebar to dismiss the success message in the command prompt that pops up.
8. Right-click on the `2-setup-environment-win` batch script, select "Run as administrator", and accept the User Account Control prompt. This part may take a couple of minutes, and you'll need to approve a driver installation, but once it finishes, your environment is complete!
If you have trouble and want to ask for help, it is useful to generate a *Win_Check_Output.txt* file by running `Win_Check.bat` in the `\util` folder.
If this is a bit complex for you, Docker might be the turn-key solution you need. After installing [Docker](https://www.docker.com/products/docker), run the following command at the root of the QMK folder to build a keyboard/keymap:
```bash
# You'll run this every time you want to build a keymap
On Windows Docker seems to have issues with the VOLUME tag in Dockerfile, and `$('pwd')` won't print a Windows compliant path; use full path instead, like this:
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](getting_started_vagrant.md).
