anchor.diff:    patches =
       # Don't search in non-Nix locations such as /usr, but do search in
       # Nixpkgs' Glibc.
  -    optional (stdenv ? libc) ./search-path-3.2.patch
  -    ++ optional stdenv.isCygwin ./3.2.2-cygwin.patch;
  +    optional (stdenv ? libc) ./search-path-3.2.patch;
   
  -  buildInputs =
  -    [ bzip2 curl expat libarchive xz zlib ]
  -    ++ optional useNcurses ncurses
  -    ++ optional useQt4 qt4;
  +  buildInputs = [ bzip2 curl expat libarchive xz zlib ]
  +    ++ optional useNcurses ncurses;
   
     propagatedBuildInputs = optional wantPS ps;
   
     CMAKE_PREFIX_PATH = stdenv.lib.concatStringsSep ":" buildInputs;
   
  -  configureFlags =
  -    [ "--docdir=/share/doc/${name}"
  -      "--mandir=/share/man"
  -      "--no-system-jsoncpp"
  -    ]
  -    ++ optional (!stdenv.isCygwin) "--system-libs"
  -    ++ optional useQt4 "--qt-gui"
  -    ++ ["--"]
  +  configureFlags = [
  +    "--docdir=/share/doc/${name}"
  +    "--mandir=/share/man"
  +    "--no-system-jsoncpp"
  +  ] ++ ["--"]
       ++ optional (!useNcurses) "-DBUILD_CursesDialog=OFF";
   
     setupHook = ./setup-hook.sh;
   
     dontUseCmakeConfigure = true;
   
  -  preConfigure = optionalString (stdenv ? libc)
  -    ''
  -      source $setupHook
  -      fixCmakeFiles .
  -      substituteInPlace Modules/Platform/UnixPaths.cmake \
  -        --subst-var-by libc ${stdenv.libc}
  -    '';
  +  preConfigure = optionalString (stdenv ? libc) ''
  +    source $setupHook
  +    fixCmakeFiles .
  +    substituteInPlace Modules/Platform/UnixPaths.cmake \
  +      --subst-var-by libc ${stdenv.libc}
  +  '';
   
     meta = {
       homepage = http://www.cmake.org/;
       description = "Cross-Platform Makefile Generator";
  -    platforms = if useQt4 then qt4.meta.platforms else stdenv.lib.platforms.all;
  +    platforms = stdenv.lib.platforms.all;
       maintainers = with stdenv.lib.maintainers; [ urkud mornfall ttuegel ];
     };
   }
  
positive.code: { stdenv, fetchurl
  , bzip2, curl, expat, libarchive, xz, zlib
  , useNcurses ? false, ncurses, useQt4 ? false, qt4
  , wantPS ? false, ps ? null
  }:
  
  with stdenv.lib;
  
negative.code: in
  
  stdenv.mkDerivation rec {
    name = "cmake-${version}";
  
    inherit majorVersion;
  
  