anchor.diff:  
     enableParallelBuilding = true;
   
  -  meta = {
  -    description = "A computer code to create and evaluate fast interpolation tables of pre-computed coefficients in perturbation theory for observables in hadron-induced processes";
  -    license      = lib.licenses.gpl3;
  -    homepage     = "http://fastnlo.hepforge.org";
  -    platforms    = lib.platforms.unix;
  -    maintainers = with lib.maintainers; [ veprbl ];
  +  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;
     };
   }
  
positive.code:     sha256 = "1h41xnqcz401x3zbs8i2dsb4xlhbv8i5ps0561p6y7gcyridgcbl";
    };
  
    buildInputs = [ boost fastjet gfortran gfortran.cc.lib lhapdf python2 root yoda ];
    propagatedBuildInputs = [ zlib ];
  
    preConfigure = ''
      substituteInPlace ./fastnlotoolkit/Makefile.in \
  
negative.code: { lib
  , stdenv
  , fetchurl
  , boost
  , fastjet
  , gfortran
  , lhapdf
  , python2
  , root
  , yoda
  , zlib
  }:
  
  stdenv.mkDerivation rec {
    pname = "fastnlo_toolkit";
  