diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 1aa990bf151..80379325ebc 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -255,9 +255,8 @@ rec {
 
     propagatedBuildInputs = [
       pythonPackages.notmuch
-      pythonPackages.subprocess32
       pythonPackages.chardet
-    ];
+    ] ++ optional (!isPy3k) pythonPackages.subprocess32;
 
     doCheck = false;