1 files changed, 20 insertions, 0 deletions
diff --git a/setup.py b/setup.py
index 1856cadb..0776ba6e 100644
--- a/setup.py
+++ b/setup.py
@@ -10,6 +10,8 @@
 # implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+from distutils.command.build import build
+
 from setuptools import setup, find_packages
 
 
@@ -30,6 +32,20 @@ setup_requires = [
     CFFI_DEPENDENCY,
 ]
 
+
+class cffi_build(build):
+    def finalize_options(self):
+        from cryptography.hazmat.bindings.openssl.binding import Binding
+        from cryptography.hazmat.primitives import constant_time, padding
+
+        self.distribution.ext_modules = [
+            Binding().ffi.verifier.get_extension(),
+            constant_time._ffi.verifier.get_extension(),
+            padding._ffi.verifier.get_extension()
+        ]
+        build.finalize_options(self)
+
+
 setup(
     name=about["__title__"],
     version=about["__version__"],
@@ -70,4 +86,8 @@ setup(
 
     # for cffi
     zip_safe=False,
+    ext_package="cryptography",
+    cmdclass={
+        "build": cffi_build,
+    }
 )