···1+diff --git a/setup.py b/setup.py
2+index e86b1b2..9d34d0d 100644
3+--- a/setup.py
4++++ b/setup.py
5+@@ -29,19 +29,7 @@ if sys.version_info < (3, 6):
6+7+ ROOT_PATH = os.path.abspath(os.path.dirname(__file__))
8+9+-rj_include_dir = './rapidjson/include'
10+-
11+-for idx, arg in enumerate(sys.argv[:]):
12+- if arg.startswith('--rj-include-dir='):
13+- sys.argv.pop(idx)
14+- rj_include_dir = arg.split('=', 1)[1]
15+- break
16+-else:
17+- if not os.path.isdir(os.path.join(ROOT_PATH, 'rapidjson', 'include')):
18+- raise RuntimeError("RapidJSON sources not found: if you cloned the git"
19+- " repository, you should initialize the rapidjson submodule"
20+- " as explained in the README.rst; in all other cases you may"
21+- " want to report the issue.")
22++rj_include_dir = '@rapidjson@/include'
23+24+ with open('version.txt', encoding='utf-8') as f:
25+ VERSION = f.read()