anchor.diff: -{ lib, stdenv
  +{ lib
  +, stdenv
   , fetchFromGitHub
  -, fetchpatch
   , autoreconfHook
  +, bison
  +, libevent
  +, ncurses
   , pkg-config
  -, bison
  -, ncurses
  -, libevent
  +, systemd
   , utf8proc
   }:
   
  
positive.code:   buildInputs = [
      ncurses
      libevent
    ] ++ lib.optionals stdenv.isDarwin [ utf8proc ];
  
    configureFlags = [
      "--sysconfdir=/etc"
      "--localstatedir=/var"
    ] ++ lib.optionals stdenv.isDarwin [ "--enable-utf8proc" ];
  
    enableParallelBuilding = true;
  
  
negative.code:   meta = {
      homepage = "https://tmux.github.io/";
      description = "Terminal multiplexer";
      longDescription = ''
        tmux is intended to be a modern, BSD-licensed alternative to programs such as GNU screen. Major features include:
          * A powerful, consistent, well-documented and easily scriptable command interface.
          * A window may be split horizontally and vertically into panes.
          * Panes can be freely moved and resized, or arranged into preset layouts.
          * Support for UTF-8 and 256-colour terminals.
          * Copy and paste with multiple buffers.
          * Interactive menus to select windows, sessions or clients.
          * Change the current window by searching for text in the target.
          * Terminal locking, manually or after a timeout.
          * A clean, easily extended, BSD-licensed codebase, under active development.
      '';
      changelog = "https://github.com/tmux/tmux/raw/${version}/CHANGES";
      license = lib.licenses.bsd3;
      platforms = lib.platforms.unix;
      maintainers = with lib.maintainers; [ thammers fpletz SuperSandro2000 ];
    };
  }
  