anchor.diff:      "-DIGRAPH_USE_INTERNAL_LAPACK=OFF"
       "-DIGRAPH_USE_INTERNAL_ARPACK=OFF"
       "-DIGRAPH_USE_INTERNAL_GLPK=OFF"
  -    "-DIGRAPH_USE_INTERNAL_CXSPARSE=OFF"
       "-DIGRAPH_USE_INTERNAL_GMP=OFF"
       "-DIGRAPH_USE_INTERNAL_PLFIT=OFF"
       "-DIGRAPH_GLPK_SUPPORT=ON"
  
positive.code: , plfit
  , python3
  , sourceHighlight
  , suitesparse
  , xmlto
  }:
  
  
negative.code:   '';
  
    meta = with lib; {
      description = "C library for complex network analysis and graph theory";
      homepage = "https://igraph.org/";
      changelog = "https://github.com/igraph/igraph/blob/${src.rev}/CHANGELOG.md";
      license = licenses.gpl2Plus;
  