anchor.diff:  
     buildInputs = [
       db
  +    elfutils
       iptables
  +    libcap
  +    #libmnl  header conflicts
     ];
   
     preConfigure = ''
  
positive.code:   src = fetchurl {
      urls = map (n: "${n}.xz") tarballUrls;
      hashOutput = false;
      sha256 = "0c5c24020fd7349fe25728c5edee9fb6a1bc8a38f08e23be5c57a6301e55ee0a";
    };
  
    nativeBuildInputs = [
  
negative.code: , lib
  
  , db
  , elfutils
  , iptables
  , libcap
  , libmnl
  }:
  
  let
    version = "4.17.0";
  
    tarballUrls = [
      "mirror://kernel/linux/utils/net/iproute2/iproute2-${version}.tar"
  