anchor.diff:    buildInputs = [
       ncurses
       libevent
  -  ] ++ lib.optionals stdenv.isDarwin [ utf8proc ];
  +  ] ++ lib.optionals stdenv.isLinux [ systemd ]
  +  ++ lib.optionals stdenv.isDarwin [ utf8proc ];
   
     configureFlags = [
       "--sysconfdir=/etc"
       "--localstatedir=/var"
  -  ] ++ lib.optionals stdenv.isDarwin [ "--enable-utf8proc" ];
  +  ] ++ lib.optionals stdenv.isLinux [ "--enable-systemd" ]
  +  ++ lib.optionals stdenv.isDarwin [ "--enable-utf8proc" ];
   
     enableParallelBuilding = true;
   
  
positive.code: { lib, stdenv
  , fetchFromGitHub
  , fetchpatch
  , autoreconfHook
  , pkg-config
  , bison
  , ncurses
  , libevent
  , utf8proc
  }:
  
  
negative.code: 
  stdenv.mkDerivation rec {
    pname = "tmux";
    version = "3.3";
  
    outputs = [ "out" "man" ];
  
  