https://github.com/source-foundry/Hack

https://github.com/NixOS/nixpkgs/blob/master/pkgs/data/fonts/hack/default.nix

issues
https://github.com/Powerlevel9k/powerlevel9k/issues/971
    EDIT > Appeaance > Choose font > Enable Show all fonts > 
    Hack Nerd Font Mono