anchor.diff:    };
   in mkDerivation rec {
     pname = "golden-cheetah";
  -  version = "3.5";
  +  version = "3.6-DEV2107";
   
     src = fetchFromGitHub {
       owner = "GoldenCheetah";
       repo = "GoldenCheetah";
  -    rev = "V${version}";
  -    sha256 = "1lyd0b2s3s9c2ppj7l4hf3s4gfzscaaam2pbiaby714bi9nr0ka7";
  +    rev = "v${version}";
  +    sha256 = "1d54x3pv27w1ys2f5l7gnfhyijhgcgdjnq1c1mj7hvg35dmh054d";
     };
   
     buildInputs = [
       qtbase qtsvg qtserialport qtwebengine qtmultimedia qttools zlib
  -    qtconnectivity qtcharts libusb-compat-0_1
  +    qtconnectivity qtcharts libusb-compat-0_1 gsl blas
     ];
     nativeBuildInputs = [ flex makeWrapper qmake bison ];
   
  
positive.code: { lib, fetchFromGitHub, fetchpatch, mkDerivation
  , qtbase, qtsvg, qtserialport, qtwebengine, qtmultimedia, qttools
  , qtconnectivity, qtcharts, libusb-compat-0_1
  , bison, flex, zlib, qmake, makeDesktopItem, makeWrapper
  }:
  
  
negative.code:     })
    ];
  
    NIX_LDFLAGS = "-lz -lgsl -lblas";
  
    qtWrapperArgs = [ "--prefix" "LD_LIBRARY_PATH" ":" "${zlib.out}/lib" ];
  
    preConfigure = ''
      cp src/gcconfig.pri.in src/gcconfig.pri
  