anchor.diff:      owner = "linux-rdma";
       repo = "rdma-core";
       rev = "v${version}";
  -    sha256 = "04mhcrcmbwxcjhswlkhnr6m5nl2389jgjv6aqhd4v0x555cwnfvw";
  +    sha256 = "0az2is6p5gkyphi2b978kwn7knry60y33kn6p7cxz49ca79a42cy";
     };
   
     nativeBuildInputs = [ cmake pkgconfig pandoc docutils makeWrapper ];
  
positive.code:   ];
  
    postPatch = ''
      substituteInPlace providers/rxe/rxe_cfg.in \
        --replace ethtool "${ethtool}/bin/ethtool" \
        --replace 'ip addr' "${iproute}/bin/ip addr" \
        --replace 'ip link' "${iproute}/bin/ip link"
  
      substituteInPlace srp_daemon/srp_daemon.sh.in \
        --replace /bin/rm rm
    '';
  
negative.code: } :
  
  let
    version = "28.0";
  
  in stdenv.mkDerivation {
    pname = "rdma-core";
  