Hosts to block in /etc/hosts

malware-hosts.nix

{ stdenv, pkgs, lib }:
let
  rawHosts = builtins.fetchurl http://winhelp2002.mvps.org/hosts.txt;
  cleanedHosts = stdenv.mkDerivation {
    name = "mvps-hosts";
    phases = [ "installPhase" ];

    installPhase = ''
      cat ${rawHosts} | tr -s '\r' '\n' | sed -e '/^#/ d' | cut -d ' ' -f 1,2 | sed -e '/localhost/ d' > $out
    '';
  };
in
  lib.readFile cleanedHosts