In order to build Atmosphère you must have devkitARM and devkitA64 installed on your computer. You can find instructions on how to install and setup devkitARM and devkitA64 on various OSes [here](https://devkitpro.org/wiki/Getting_Started). You'll need to install the following packages via (dkp-)pacman: switch-dev switch-freetype devkitARM devkitarm-rules
sept requires you have python installed with the pycryptodome PyPi packages (`pip install pycryptodome`). You may also want to install the zip package from your package manager of choice to support the `make dist` recipe.
Once you have finished installing the devkitPro-provided toolchain/libraries, python, and the dependencies, simply clone the Atmosphère repo (clone with the -r flag), change your directory to it and run `make`.