anchor.diff:    # We want to use latest versions of tools we have available
     # (more checks, less false positives)
     tools = {
  -    doxygen = pkgs-tools.doxygen;
  -    valgrind = pkgs-tools.valgrind;
  -    cppcheck = pkgs-tools.cppcheck;
  +    inherit (pkgs-tools)
  +      doxygen
  +      valgrind
  +      cppcheck;
     };
   
     callPackage = pkgs.lib.callPackageWith (pkgs // tools // self);
  
positive.code:       patches = [ ./astyle/max_indent.patch ];
      });
  
      kaa-client-c = callPackage ./kaa-client-c { cmake = pkgs.cmake-2_8; };
  
      kaa-client-cpp = callPackage ./kaa-client-cpp { cmake = pkgs.cmake-2_8; };
  
negative.code: let
    nixpkgs-bootstrap = import <nixpkgs> { };
  
    # How to update nixpkgs version:
    # - go to https://github.com/NixOS/nixpkgs-channels
    # - select branch you want to track
    # - get latest commit hash -- this goes to `rev` field
    # - execute `nix-prefetch-url --unpack https://github.com/NixOS/nixpkgs-channels/<rev>.tar.gz`
    # - output of the previous command goes to `sha256` field
    nixpkgs-16_03 = import (nixpkgs-bootstrap.fetchFromGitHub {
      owner = "NixOS";
      repo = "nixpkgs-channels";
  