anchor.diff:    # larger updated load commands do not fit. Use install_name_tool
     # explicitly and ignore the error.
     postFixup = stdenvNoCC.lib.optionalString stdenvNoCC.isDarwin ''
  -      for f in $out/lib/*.dylib; do
  -          install_name_tool -id $out/lib/$(basename $f) $f || true
  -      done
  -      install_name_tool -change @rpath/libiomp5.dylib $out/lib/libiomp5.dylib $out/lib/libmkl_intel_thread.dylib
  -      install_name_tool -change @rpath/libtbb.dylib $out/lib/libtbb.dylib $out/lib/libmkl_tbb_thread.dylib
  -      install_name_tool -change @rpath/libtbbmalloc.dylib $out/lib/libtbbmalloc.dylib $out/lib/libtbbmalloc_proxy.dylib
  +    for f in $out/lib/*.dylib; do
  +      install_name_tool -id $out/lib/$(basename $f) $f || true
  +    done
  +    install_name_tool -change @rpath/libiomp5.dylib $out/lib/libiomp5.dylib $out/lib/libmkl_intel_thread.dylib
  +    install_name_tool -change @rpath/libtbb.dylib $out/lib/libtbb.dylib $out/lib/libmkl_tbb_thread.dylib
  +    install_name_tool -change @rpath/libtbbmalloc.dylib $out/lib/libtbbmalloc.dylib $out/lib/libtbbmalloc_proxy.dylib
     '';
   
     # Per license agreement, do not modify the binary
  
positive.code:   For details on using mkl as a blas provider for python packages such as numpy,
    numexpr, scipy, etc., see the Python section of the NixPkgs manual.
  */
  stdenvNoCC.mkDerivation rec {
    name = "mkl-${version}";
    version = "${date}.${rel}";
    date = "2019.3";
    rel = "199";
  
    src = if stdenvNoCC.isDarwin
      then
  
negative.code:     homepage = https://software.intel.com/en-us/mkl;
      license = licenses.issl;
      platforms = [ "x86_64-linux" "x86_64-darwin" ];
      maintainers = with maintainers; [ bhipple ];
    };
  }
  