anchor.diff: -{ lib, stdenv, fetchurl, boost, fastjet, gfortran, lhapdf, python2, root, yoda, zlib }:
  +{ lib
  +, stdenv
  +, fetchurl
  +, boost
  +, fastjet
  +, gfortran
  +, lhapdf
  +, python2
  +, root
  +, yoda
  +, zlib
  +}:
   
   stdenv.mkDerivation rec {
     pname = "fastnlo_toolkit";
  
positive.code:     sha256 = "1h41xnqcz401x3zbs8i2dsb4xlhbv8i5ps0561p6y7gcyridgcbl";
    };
  
    buildInputs = [ boost fastjet gfortran gfortran.cc.lib lhapdf python2 root yoda ];
    propagatedBuildInputs = [ zlib ];
  
    preConfigure = ''
      substituteInPlace ./fastnlotoolkit/Makefile.in \
  
negative.code: 
    enableParallelBuilding = true;
  
    meta = with lib; {
      homepage = "http://fastnlo.hepforge.org";
      description = "Fast pQCD calculations for hadron-induced processes";
      longDescription = ''
        The fastNLO project provides computer code to create and evaluate fast
        interpolation tables of pre-computed coefficients in perturbation theory
        for observables in hadron-induced processes.
  
        This allows fast theory predictions of these observables for arbitrary
        parton distribution functions (of regular shape), renormalization or
        factorization scale choices, and/or values of alpha_s(Mz) as e.g. needed
        in PDF fits or in systematic studies. Very time consuming complete
        recalculations are thus avoided.
      '';
      license = licenses.gpl3Plus;
      maintainers = with maintainers; [ veprbl ];
      platforms = platforms.unix;
    };
  }
  