diff --git a/pkgs/development/python-modules/pyopenssl/default.nix b/pkgs/development/python-modules/pyopenssl/default.nix
new file mode 100644
index 000000000000..6f028341e97d
--- /dev/null
+++ b/pkgs/development/python-modules/pyopenssl/default.nix
@@ -0,0 +1,46 @@
+{ stdenv
+, buildPythonPackage
+, fetchPypi
+, openssl
+, cryptography
+, pyasn1
+, idna
+, pytest
+, pretend
+, flaky
+, glibcLocales
+}:
+
+buildPythonPackage rec {
+  pname = "pyOpenSSL";
+  version = "17.2.0";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "0d283g4zi0hr9papd24mjl70mi15gyzq6fx618rizi87dgipqqax";
+  };
+
+  outputs = [ "out" "dev" ];
+
+  preCheck = ''
+    sed -i 's/test_set_default_verify_paths/noop/' tests/test_ssl.py
+    # https://github.com/pyca/pyopenssl/issues/692
+    sed -i 's/test_fallback_default_verify_paths/noop/' tests/test_ssl.py
+  '';
+
+  checkPhase = ''
+    runHook preCheck
+    export LANG="en_US.UTF-8"
+    py.test
+    runHook postCheck
+  '';
+
+  # Seems to fail unpredictably on Darwin. See http://hydra.nixos.org/build/49877419/nixlog/1
+  # for one example, but I've also seen ContextTests.test_set_verify_callback_exception fail.
+  doCheck = !stdenv.isDarwin;
+
+  buildInputs = [ openssl ];
+  propagatedBuildInputs = [ cryptography pyasn1 idna ];
+
+  checkInputs = [ pytest pretend flaky glibcLocales ];
+}
\ No newline at end of file
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index c697f3449d4a..5c6ba0b0b829 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -14644,39 +14644,7 @@ in {
     doCheck = false;
   };
 
-  pyopenssl = buildPythonPackage rec {
-    pname = "pyOpenSSL";
-    name = "${pname}-${version}";
-    version = "17.2.0";
-
-    src = self.fetchPypi {
-      inherit pname version;
-      sha256 = "0d283g4zi0hr9papd24mjl70mi15gyzq6fx618rizi87dgipqqax";
-    };
-
-    outputs = [ "out" "dev" ];
-
-    preCheck = ''
-      sed -i 's/test_set_default_verify_paths/noop/' tests/test_ssl.py
-      # https://github.com/pyca/pyopenssl/issues/692
-      sed -i 's/test_fallback_default_verify_paths/noop/' tests/test_ssl.py
-    '';
-
-    checkPhase = ''
-      runHook preCheck
-      export LANG="en_US.UTF-8"
-      py.test
-      runHook postCheck
-    '';
-
-    # Seems to fail unpredictably on Darwin. See http://hydra.nixos.org/build/49877419/nixlog/1
-    # for one example, but I've also seen ContextTests.test_set_verify_callback_exception fail.
-    doCheck = !stdenv.isDarwin;
-
-    buildInputs = [ pkgs.openssl self.pytest pkgs.glibcLocales self.pretend self.flaky ];
-    propagatedBuildInputs = [ self.cryptography self.pyasn1 self.idna ];
-  };
-
+  pyopenssl = callPackage ../development/python-modules/pyopenssl { };
 
   pyquery = buildPythonPackage rec {
     name = "pyquery-${version}";