diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 8b6c9c9a1c7..56bdde7a307 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -4056,10 +4056,13 @@ in {
 
   hydra = callPackage ../development/python-modules/hydra { };
 
+  # File name is called 2.nix because this one will need to remain for Python 2.
+  hypothesis_4 = callPackage ../development/python-modules/hypothesis/2.nix { };
+
   hypothesis = if isPy3k then
     callPackage ../development/python-modules/hypothesis { }
   else
-    callPackage ../development/python-modules/hypothesis/2.nix { };
+    self.hypothesis_4;
 
   hydra-check = callPackage ../development/python-modules/hydra-check { };