anchor.diff:  { nixpkgs ? { outPath = (import ../.. {}).lib.cleanSource ../..; revCount = 1234; shortRev = "abcdef"; }
   , officialRelease ? false
   , # The platforms for which we build Nixpkgs.
  -  supportedSystems ? [ "x86_64-linux" "i686-linux" "x86_64-darwin" ]
  +  supportedSystems ? [ "x86_64-linux" "i686-linux" "x86_64-darwin" "aarch64-linux" ]
   , # Strip most of attributes when evaluating to spare memory usage
     scrubJobs ? true
   }:
  
positive.code:     }) // (lib.optionalAttrs (builtins.elem "x86_64-linux" supportedSystems) {
        stdenvBootstrapTools.x86_64-linux =
          { inherit (import ../stdenv/linux/make-bootstrap-tools.nix { system = "x86_64-linux"; }) dist test; };
      }) // (lib.optionalAttrs (builtins.elem "x86_64-darwin" supportedSystems) {
        stdenvBootstrapTools.x86_64-darwin =
          let
  
negative.code:               jobs.lib-tests
                jobs.stdenv.x86_64-linux
                jobs.stdenv.i686-linux
                jobs.stdenv.aarch64-linux
                jobs.stdenv.x86_64-darwin
                jobs.linux.x86_64-linux
                jobs.linux.i686-linux
                jobs.linux.aarch64-linux
                jobs.python.x86_64-linux
                jobs.python.i686-linux
                jobs.python.aarch4-linux
                jobs.python.x86_64-darwin
                jobs.python3.x86_64-linux
                jobs.python3.i686-linux
                jobs.python3.aarchh64-linux
                jobs.python3.x86_64-darwin
                # Many developers use nix-repl
                jobs.nix-repl.x86_64-linux
                jobs.nix-repl.i686-linux
                jobs.nix-repl.aarch64-linux
                jobs.nix-repl.x86_64-darwin
                # Needed by travis-ci to test PRs
                jobs.nox.i686-linux
  