anchor.diff:  { supportedSystems, packageSet ? (import ./all-packages.nix) }:
  +
  +with import ../../lib;
   
   rec {
   
  
positive.code:   /* The working or failing mails for cross builds will be sent only to
       the following maintainers, as most package maintainers will not be
       interested in the result of cross building a package. */
    crossMaintainers = with pkgs.lib.maintainers; [ viric ];
  
  
    toJob = x: if builtins.isAttrs x then x else
      { type = "job"; systems = x; };
  
  
  
negative.code: 
  
    /* Common platform groups on which to test packages. */
    inherit (platforms) unix linux darwin cygwin allBut all mesaPlatforms;
  
    /* Platform groups for specific kinds of applications. */
    x11Supported = linux;
  