An operating system targeting (for the moment) x86_64 hardware. See roadmap here.
Used font is a modified version of Hack, licensed under the MIT license.
First, install all the dependencies using sudo make deps-debian. Make sure your package list cache is up-to-date.
Then, build the system toolchains using make toolchain. This step might take a while depending on your computer.
And, in the end, launch QEMU using make run.