anchor.diff:      owner = "tmux";
       repo = "tmux";
       rev = version;
  -    sha256 = "0jvyq4r691bn0wsr8i6c0q0lzss25vm9nx8sv3fhw9cs63ncq04y";
  +    sha256 = "1fqgpzfas85dn0sxlvvg6rj488jwgnxs8d3gqcm8lgs211m9qhcf";
     };
   
     nativeBuildInputs = [
  
positive.code: 
  stdenv.mkDerivation rec {
    pname = "tmux";
    version = "3.1b";
  
    outputs = [ "out" "man" ];
  
  
negative.code:   '';
  
    meta = {
      homepage = "https://tmux.github.io/";
      description = "Terminal multiplexer";
  
      longDescription =
  