anchor.diff:      make library        \
           JOBS=$NIX_BUILD_CORES \
           BLAS=-lopenblas \
  +        MY_METIS_LIB=-lmetis \
           LAPACK=""       \
           ${stdenv.lib.optionalString openblas.blas64 "CFLAGS=-DBLAS64"}
   
  
positive.code: , fetchFromGitHub
  , gfortran
  , openblas
  , cmake
  , fixDarwinDylibNames
  , gnum4
  
negative.code: 
    buildInputs = [
      openblas
      metis
      gfortran.cc.lib
    ] ++ stdenv.lib.optional enableCuda cudatoolkit;
  
  