anchor.diff: -{ stdenvNoCC, fetchurl, rpm, cpio, undmg, darwin, enableStatic ? false }:
  +{ stdenvNoCC, fetchurl, rpmextract, undmg, darwin, enableStatic ? false }:
   /*
     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.
  
positive.code:       cp -r compilers_and_libraries_${version}/mac/mkl/bin/pkgconfig/* $out/lib/pkgconfig
    '' else ''
        mkdir -p $out/lib
  
        cp -r opt/intel/compilers_and_libraries_${version}/linux/mkl/include $out/
  
        cp -r opt/intel/compilers_and_libraries_${version}/linux/compiler/lib/intel64_lin/* $out/lib/
        cp -r opt/intel/compilers_and_libraries_${version}/linux/mkl/lib/intel64_lin/* $out/lib/
        cp license.txt $out/lib/
  
        mkdir -p $out/lib/pkgconfig
        cp -r opt/intel/compilers_and_libraries_${version}/linux/mkl/bin/pkgconfig/* $out/lib/pkgconfig
    '');
  
    # fixDarwinDylibName fails for libmkl_cdft_core.dylib because the
    # larger updated load commands do not fit. Use install_name_tool
  
negative.code:     done
    '' else ''
      # Common stuff
      rpmextract rpm/intel-mkl-core-${rpm-ver}.x86_64.rpm
      rpmextract rpm/intel-mkl-common-c-${rpm-ver}.noarch.rpm
      rpmextract rpm/intel-mkl-common-f-${rpm-ver}.noarch.rpm
  
      # Dynamic libraries
      rpmextract rpm/intel-mkl-cluster-rt-${rpm-ver}.x86_64.rpm
      rpmextract rpm/intel-mkl-core-rt-${rpm-ver}.x86_64.rpm
      rpmextract rpm/intel-mkl-gnu-f-rt-${rpm-ver}.x86_64.rpm
      rpmextract rpm/intel-mkl-gnu-rt-${rpm-ver}.x86_64.rpm
  
      # Intel OpenMP runtime
      rpmextract rpm/intel-openmp-${openmp-ver}.x86_64.rpm
    '' + (if enableStatic then ''
      # Static libraries
      rpmextract rpm/intel-mkl-cluster-${rpm-ver}.x86_64.rpm
      rpmextract rpm/intel-mkl-gnu-${rpm-ver}.x86_64.rpm
      rpmextract rpm/intel-mkl-gnu-f-${rpm-ver}.x86_64.rpm
    '' else ''
      # Take care of installing dynamic-only PkgConfig files during the installPhase
    ''
    );
  
  