anchor.diff: -{ lib, stdenv, fetchFromGitHub, cmake, fetchpatch
  +{ lib
  +, stdenv
  +, fetchFromGitHub
  +, cmake
  +, fetchpatch
   , staticOnly ? stdenv.hostPlatform.isStatic
   }:
   
  
positive.code:     sha256 = "sOeXNVsCaBSD9i82GRUDrkyreGeQ7qaJWjjy/uLL0/0=";
    });
  
    cmakeFlags = []
      ++ lib.optional staticOnly "-DBUILD_SHARED_LIBS=OFF";
  
    outputs = [ "out" "dev" "lib" ];
  
  
negative.code:   src = fetchFromGitHub {
      owner = "google";
      repo = "brotli";
      rev = "v${version}";
      sha256 = "z6Dhrabav1MDQ4rAcXaDv0aN+qOoh9cvoXZqEWBB13c=";
    };
  
  