anchor.diff:      sed -i 's,-g -ggdb -Wall -Werror,-O2,g' configure.ac
   
       # Don't build broken examples
  -    sed -i '/AC_CONFIG_SUBDIRS(\[\(examples\|tests\).*/d' configure.ac
  +    sed -i 's/AC_CONFIG_\(SUBDIRS\|FILES\)(\[\(examples\|tests\).*/AC_MSG_RESULT([Not building...])/' configure.ac
  +    sed -i 's,subdirs.*\(examples\|tests\).*,AC_MSG_RESULT([Not building...]),g' configure.ac
   
       # Allow the installation of xio kernel headers
       sed -i 's,/opt/xio,''${out},g' src/kernel/xio/Makefile.in
  
positive.code:   meta = with stdenv.lib; {
      homepage = http://www.accelio.org/;
      description = "High-performance messaging and RPC library";
      longDescription = ''
        A high-performance asynchronous reliable messaging and RPC library
        optimized for hardware acceleration.
      '';
      license = licenses.bsd3;
      platforms = with platforms; linux ++ freebsd;
      maintainers = with maintainers; [ wkennington ];
    };
  }
  
negative.code: { stdenv
  , autoreconfHook
  , fetchFromGitHub
  
  , libevent
  , libibverbs
  , librdmacm
  , numactl
  
  , kernel ? null
  }:
  
  let
    version = "1.6";
  in
  stdenv.mkDerivation rec {
    name = "accelio-${version}${stdenv.lib.optionalString (kernel != null) "-kernel"}";
  
    src = fetchFromGitHub {
      owner = "accelio";
      repo = "accelio";
      rev = "v${version}";
      sha256 = "89f8d22ef3fb4f0d05a780d56014f41c5f179bea87f62eebfd4c5cc90a239541";
    };
  
    nativeBuildInputs = [
      autoreconfHook
    ];
  
    buildInputs = [
      libevent
      libibverbs
      librdmacm
      numactl
    ];
  
    postPatch = ''
  