Pidgin

If you want to use pidgin with the OTR plugin, you will find out, that installing the plugin with nix-env -iA nixos.pidginotr does not work. The plugin doesn't appear in the plugin list.

To use it, you need to make a packageOverride.

Put this into ~/.config/nixpkgs/config.nix:

{
 packageOverrides = pkgs: rec {
  pidgin-with-plugins  = pkgs.pidgin-with-plugins.override {
       plugins = [ pkgs.pidginotr ];};
 };
}

Then you can install pidgin with nix-env -iA nixos.pidgin-with-plugins. This install will have the OTR plugin available.