anchor.diff:    # mpfr.h requires gmp.h
     propagatedBuildInputs = [ gmp ];
   
  -  configureFlags =
  -    optional stdenv.is64bit "--with-pic";
  +  configureFlags = [
  +    "--with-pic"
  +  ];
   
     doCheck = true;
   
     meta = {
       homepage = http://www.mpfr.org/;
       description = "Library for multiple-precision floating-point arithmetic";
  -
  -    longDescription = ''
  -      The GNU MPFR library is a C library for multiple-precision
  -      floating-point computations with correct rounding.  MPFR is
  -      based on the GMP multiple-precision library.
  -
  -      The main goal of MPFR is to provide a library for
  -      multiple-precision floating-point computation which is both
  -      efficient and has a well-defined semantics.  It copies the good
  -      ideas from the ANSI/IEEE-754 standard for double-precision
  -      floating-point arithmetic (53-bit mantissa).
  -    '';
  -
       license = licenses.lgpl2Plus;
  -
  -    maintainers = [ ];
  -    platforms = platforms.all;
  +    maintainers = with maintainers; [
  +      wkennington
  +    ];
  +    platforms = with platforms;
  +      i686-linux
  +      ++ x86_64-linux;
     };
   }
  
positive.code: { stdenv, fetchurl, gmp }:
  
  let
    patchSha256s = {
  
negative.code:     "patch03" = "0p1y7mwbnshbj81hg5nfprzwh4aakxszf7n8bn4kh66jka4cw79c";
      "patch04" = "0vp2ywg8p0a2g8wai4fw29mbx1nq5yjzd361h2mr4cn6vac4a3sz";
      "patch05" = "1y0izl4y17xrdjidl2p1m1vapmgci5qv6shk0aqd187nvrs72jgw";
      "patch06" = "13xq302vqzsb1w09bs8n3q4wa4s7nzjfwi4s3cpka3diga7ah3qm";
      "patch07" = "08vk9ldp3s9kzkqjpsyd3d1ar0dkbamdg7k9yf9s6zmfdvpzjr6y";
      "patch08" = "1ip1x7y8p3jv5wsz57cgbgxg02qza8d1lpvsr01q9hmnp1x31sy8";
      "patch09" = "1sh7x9nk3p5hkq9qzwwhyjvsj91g9a06sb148lkyhi1kid5956rn";
      "patch10" = "19vhfiky30v69igg5yrnggnr8r7sqqwnfkwl33zz4yins9fwphf4";
      "patch11" = "1dj5jjchxnl25bfizxb6xs7470yz6vc5j2iqq9qpgx136iby14k8";
      "patch12" = "17bk5zmxlxql0ch8ybiwmkxm3arfq0r05yyz761ahqc8lxjinr06";
    };
  in
  with stdenv.lib;
  