anchor.diff:      description = "Free software for distributed and grid computing";
       homepage = "https://boinc.berkeley.edu/";
       license = licenses.lgpl2Plus;
  -    platforms = platforms.linux;  # arbitrary choice
  -    # checking for gcc options needed to detect all undeclared functions... cannot detect
  -    # configure: error: in `/build/boinc-7.18.1-src':
  -    # configure: error: cannot make gcc report undeclared builtins
  -    broken = stdenv.isAarch64;
  +    platforms = platforms.linux;
       maintainers = with maintainers; [ Luflosi ];
     };
   }
  
positive.code:   nativeBuildInputs = [ libtool automake autoconf m4 pkg-config ];
  
    buildInputs = [
      curl libGLU libGL libXmu libXi freeglut libjpeg wxGTK30 sqlite gtk2 libXScrnSaver
      libnotify patchelf libX11 libxcb xcbutil
    ];
  
    NIX_LDFLAGS = "-lX11";
  
negative.code: { fetchFromGitHub
  , lib
  , stdenv
  , autoconf
  , automake
  , pkg-config
  , m4
  , curl
  , libGLU
  , libGL
  , libXmu
  , libXi
  , freeglut
  , libjpeg
  , libtool
  , wxGTK32
  , xcbutil
  , sqlite
  , gtk3
  , patchelf
  , libXScrnSaver
  , libnotify
  , libX11
  , libxcb
  }:
  
  let
    majorVersion = "7.20";
  