anchor.diff:      owner = "linux-rdma";
       repo = "rdma-core";
       rev = "v${version}";
  -    sha256 = "038msip4fnd8fh6m0vhnqwsaarp86dbnc9hvf5n19aqhlqbabbdc";
  +    sha256 = "1r1gfps1xckky06ib1rbf6lp58v2jqpy1ipkr45rf55gpaxf93cj";
     };
   
  -  nativeBuildInputs = [ cmake pkgconfig pandoc ];
  +  nativeBuildInputs = [ cmake pkgconfig pandoc docutils makeWrapper ];
     buildInputs = [ libnl ethtool iproute udev python perl ];
   
     cmakeFlags = [
  
positive.code:       --replace ethtool "${ethtool}/bin/ethtool" \
        --replace 'ip addr' "${iproute}/bin/ip addr" \
        --replace 'ip link' "${iproute}/bin/ip link"
    '';
  
    meta = with stdenv.lib; {
  
negative.code: { stdenv, fetchFromGitHub, cmake, pkgconfig, docutils
  , pandoc, ethtool, iproute, libnl, udev, python, perl
  , makeWrapper
  } :
  
  let
    version = "25.0";
  
  in stdenv.mkDerivation {
    name = "rdma-core-${version}";
  