TIL - How to Change Emojis in nh

Me — Sun, 10 Aug 2025 00:00:00 +0000

TIL - How to Change Emojis in nh

Recently I have been trying to update the emojis when I run nh. Particularly the nom output.

The old output was like so:

To fix this update your nh derivation like so:

environment.systemPackages = with pkgs; [
  (pkgs.nh.override {
    nix-output-monitor = pkgs.nix-output-monitor.overrideAttrs (old: {
      postPatch = old.postPatch or "" + ''
        substituteInPlace lib/NOM/Print.hs \
          --replace 'down = "↓"' 'down = "\xf072e"' \
          --replace 'up = "↑"' 'up = "\xf0737"' \
          --replace 'clock = "⏱"' 'clock = "\xf520"' \
          --replace 'running = "⏵"' 'running = "\xf04b"' \
          --replace 'done = "✔"' 'done = "\xf00c"' \
          --replace 'todo = "⏸"' 'todo = "\xf04d"' \
          --replace 'warning = "⚠"' 'warning = "\xf071"' \
          --replace 'average = "∅"' 'average = "\xf1da"' \
          --replace 'bigsum = "∑"' 'bigsum = "\xf04a0"'
      '';
    });
  })
];

Note you will no longer be able to use the default nix cache to build this. So everytime nh updates you will need to manually build it.

Emoji on Haseeb Majid

TIL - How to Change Emojis in nh