anchor.diff: -{ nixosSrc ? {outPath = ./.; rev = 1234;} }:
  +{ nixosSrc ? {outPath = ./.; rev = 1234;}
  +, nixpkgs ? {outPath = <nixpkgs>; rev = 5678;}
  +}:
   
   let
   
  
positive.code:           (import lib/eval-config.nix {
              modules = [ { fileSystems = []; } ];
            }).options;
          revision =
            if nixosSrc.rev == 1234 then "HEAD" else toString nixosSrc.rev;
        }).manual;
  
  
  
negative.code:       };
  
  
      channel =
        { officialRelease ? false }:
  
        with import <nixpkgs> {};
  
        releaseTools.makeSourceTarball {
          name = "nixos-channel";
  
          version = builtins.readFile ./VERSION;
  
          src = nixosSrc;
  
          inherit officialRelease;
  
          buildInputs = [ nixUnstable ];
  
          expr =
            ''
              { system ? builtins.currentSystem }:
              { pkgs = (import nixpkgs/default.nix { inherit system; }) // { recurseForDerivations = true; }; }
            '';
  
          distPhase = ''
            releaseName=nixos-$VERSION$VERSION_SUFFIX-${toString nixpkgs.rev}
            ensureDir "$out/tarballs"
            mkdir ../$releaseName
            cp -prd . ../$releaseName/nixos
            cp -prd ${nixpkgs} ../$releaseName/nixpkgs
            echo "$expr" > ../$releaseName/default.nix
            NIX_STATE_DIR=$TMPDIR nix-env -f ../$releaseName/default.nix -qaP --meta --xml \* > /dev/null
            cd ..
            tar cfj $out/tarballs/$releaseName.tar.bz2 $releaseName
          ''; # */
        };
  
  
      manual =
        { officialRelease ? false }:
  
  