anchor.diff:      '';
       homepage = https://www.chiark.greenend.org.uk/~sgtatham/putty/;
       license = licenses.mit;
  -    platforms = platforms.linux;
  +    platforms = platforms.unix ++ platforms.windows;
     };
   }
  
positive.code: { stdenv, fetchurl, autoconf, automake, pkgconfig, libtool
  , gtk2, halibut, ncurses, perl }:
  
  stdenv.mkDerivation rec {
    version = "0.70";
  
negative.code:         -e '/AC_OUTPUT/iAM_PROG_AR' -i configure.ac
      ./mkauto.sh
      cd unix
    '' + lib.optionalString hostPlatform.isWindows ''
      cd windows
    '';
  
    TOOLPATH = stdenv.cc.targetPrefix;
    makefile = if hostPlatform.isWindows then "Makefile.mgw" else null;
  
    installPhase = if hostPlatform.isWindows then ''
      for exe in *.exe; do
         install -D $exe $out/bin/$exe
      done
    '' else null;
  
    nativeBuildInputs = [ autoconf automake halibut libtool perl pkgconfig ];
    buildInputs = []
                ++ lib.optionals hostPlatform.isUnix [ gtk2 ncurses ];
    enableParallelBuilding = true;
  
    meta = with lib; {
      description = "A Free Telnet/SSH Client";
      longDescription = ''
        PuTTY is a free implementation of Telnet and SSH for Windows and Unix
  