To install just run the install script:

$ ./install.sh

To get all features working properly make sure you change your terminal font to hack (installed locally by the install.sh).

On iterm2 (OS X) I use Hack Nerd Font 14pt as font (anti-aliased).

Also make sure you are using xterm-256color as your TERM. You can do that by adding the following line to your ~/.zshrc or ~/.bashrc:

export TERM=xterm-256color

Hack fonts are downloaded from https://github.com/source-foundry/Hack and the "Nerd Font" version from https://github.com/ryanoasis/nerd-fonts/tree/master/patched-fonts/Hack/Regular/complete.

This font setup also supports powerlevel10k (zsh theme).