anchor.diff:  , ed
   , fetchurl
   , flex
  +, lib
   
   , ncurses
   , readline
  
positive.code:     };
    };
  
    meta = with stdenv.lib; {
      description = "GNU software calculator";
      homepage = http://www.gnu.org/software/bc/;
      license = with licenses; [
  
negative.code:     touch doc doc/*
    '';
  
    doCheck = true;
  
    passthru = {
      srcVerification = fetchurl {
  