anchor.diff:  
   mkvtoolnix = callPackage ../all-pkgs/mkvtoolnix { };
   
  +mongodb-tools = pkgs.goPackages.mongo-tools.bin // { outputs = [ "bin" ]; };
  +
   mp4v2 = callPackage ../all-pkgs/mp4v2 { };
   
   mpd = callPackage ../all-pkgs/mpd { };
  
positive.code: #  lshw = callPackage ../tools/system/lshw { };
  #
    lxc = callPackage ../os-specific/linux/lxc { };
    lxd = pkgs.goPackages.lxd.bin // { outputs = [ "bin" ]; };
  #
  #  lzop = callPackage ../tools/compression/lzop { };
  #
  
negative.code: 
  dhcpcd = callPackage ../all-pkgs/dhcpcd { };
  
  discosrv = pkgs.goPackages.discosrv.bin // { outputs = [ "bin" ]; };
  
  diffutils = callPackage ../all-pkgs/diffutils { };
  
  dnscrypt-proxy = callPackage ../all-pkgs/dnscrypt-proxy { };
  