diff --git a/pkgs/development/python-modules/hypothesis.nix b/pkgs/development/python-modules/hypothesis.nix
index f313f6ab5c4..7505d3bf5b7 100644
--- a/pkgs/development/python-modules/hypothesis.nix
+++ b/pkgs/development/python-modules/hypothesis.nix
@@ -1,5 +1,5 @@
 { stdenv, buildPythonPackage, fetchFromGitHub, python
-, isPy27, enum34
+, pythonOlder, enum34
 , doCheck ? true, pytest, flake8, flaky
 }:
 buildPythonPackage rec {
@@ -21,7 +21,7 @@ buildPythonPackage rec {
   };
 
   buildInputs = stdenv.lib.optionals doCheck [ pytest flake8 flaky ];
-  propagatedBuildInputs = stdenv.lib.optionals isPy27 [ enum34 ];
+  propagatedBuildInputs = stdenv.lib.optionals (pythonOlder "3.4") [ enum34 ];
 
   inherit doCheck;