anchor.diff: -{ lib, stdenv, fetchFromGitHub, sqlite, readline, asciidoc, SDL, SDL_gfx }:
  +{ lib
  +, stdenv
  +, fetchFromGitHub
   
  -let
  -  makeSDLFlags = map (p: "-I${lib.getDev p}/include/SDL");
  +, asciidoc
  +, pkg-config
  +, inetutils
   
  -in stdenv.mkDerivation rec {
  +, sqlite
  +, readline
  +, SDL
  +, SDL_gfx
  +}:
  +
  +stdenv.mkDerivation rec {
     pname = "jimtcl";
  -  version = "0.79";
  +  version = "0.81";
   
     src = fetchFromGitHub {
       owner = "msteveb";
       repo = "jimtcl";
       rev = version;
  -    sha256 = "1k88hz0v3bi19xdvlp0i9nsx38imzwpjh632w7326zwbv2wldf0h";
  +    sha256 = "sha256-OpM9y7fQ+18qxl3/5wUCrNA9qiCdA0vTHqLYSw2lvJs=";
     };
   
     nativeBuildInputs = [
  +    pkg-config
       asciidoc
     ];
   
  
positive.code:     # test exec2-3.2 fails depending on platform or sandboxing (?)
      rm tests/exec2.test
    '';
  
    postInstall = ''
      ln -sr $out/lib/libjim.so.${version} $out/lib/libjim.so
  
negative.code:     "--ipv6"
    ];
  
    enableParallelBuilding = true;
  
    doCheck = true;
  