infra/nix/home-manager/profiles/nix-channels.nix

{
  pkgs,
  config,
  ...
}: let
in {
  home.file.".nix-channels".text = "";

  home.activation.removeExistingNixChannels = config.lib.dag.entryBefore ["checkLinkTargets"] ''
    $DRY_RUN_CMD ${
      pkgs.writeScript "activation-script" ''
        set -ex
        if test -f $HOME/.nix-channels; then
          echo Uninstalling available channels...
          if test -f $HOME/.nix-channel; then
            while read url channel; do
              nix-channel --remove $channel
            done < $HOME/.nix-channel
          fi
          echo Moving existing file away...
          touch $HOME/.nix-channels.dummy
          mv --backup=numbered $HOME/.nix-channels.dummy $HOME/.nix-channels
          rm $HOME/.nix-channels
        fi
      ''
    };
  '';
}