anchor.diff:      ;
     postInstall = ''
       sed -e 's/@[-a-zA-Z_]*@//g' -i $out/bin/ecl-config
  +    wrapProgram "$out/bin/ecl" \
  +      --prefix NIX_LDFLAGS ' ' "-L${gmp.lib or gmp.out or gmp}/lib" \
  +      --prefix NIX_LDFLAGS ' ' "-L${libffi.lib or libffi.out or libffi}/lib"
     '';
     meta = {
       inherit (s) version;
  
positive.code:     sha256="16ab8qs3awvdxy8xs8jy82v8r04x4wr70l9l2j45vgag18d2nj1d";
    };
    buildInputs = [
      libtool autoconf automake
    ];
    propagatedBuildInputs = [
      libffi gmp mpfr
  
negative.code: {stdenv, fetchurl
  , libtool, autoconf, automake
  , gmp, mpfr, libffi, makeWrapper
  , noUnicode ? false, 
  }:
  let
  