taffybar_vanilla = pkgs.taffybar.override { packages = (x: [x.alsa-mixer]); };
    taffybar_patched = taffybar_vanilla.overrideAttrs (oldAttrs: rec {
      postPatch = ''
        sed -i 's/0 ../1 ../' src/System/Taffybar/WorkspaceSwitcher.hs
      '';
    });