anchor.diff:  
   stdenv.mkDerivation rec {
     pname = "ace";
  -  version = "6.5.11";
  +  version = "7.0.1";
   
     src = fetchurl {
  -    url = "http://download.dre.vanderbilt.edu/previous_versions/ACE-${version}.tar.bz2";
  -    sha256 = "0fbbysy6aymys30zh5m2bygs84dwwjnbsdl9ipj1rvfrhq8jbylb";
  +    url = "https://download.dre.vanderbilt.edu/previous_versions/ACE-${version}.tar.bz2";
  +    sha256 = "sha256-5nH5a0tBOcGfA07eeh9EjH0vgT3gTRWYHXoeO+QFQjQ=";
     };
   
     enableParallelBuilding = true;
  
positive.code:     "-Wno-error=format-security"
    ];
  
    patchPhase = ''substituteInPlace ./MPC/prj_install.pl \
      --replace /usr/bin/perl "${perl}/bin/perl"'';
  
    preConfigure = ''
      export INSTALL_PREFIX=$out
  
negative.code:   '';
  
    meta = with lib; {
      homepage = "https://www.dre.vanderbilt.edu/~schmidt/ACE.html";
      description = "ADAPTIVE Communication Environment";
      license = licenses.doc;
      maintainers = with maintainers; [ nico202 ];
      platforms = platforms.linux;
    };
  }
  