diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 7d694558f42..f14dbfaea47 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -11379,7 +11379,8 @@ in modules // {
     buildInputs = with self; [ nose pkgs.glibcLocales pygments ] ++ optionals isPy27 [mock];
 
     propagatedBuildInputs = with self;
-      [decorator pickleshare prompt_toolkit simplegeneric traitlets requests2 pexpect sqlite3]
+      [ backports_shutil_get_terminal_size decorator pickleshare prompt_toolkit
+      simplegeneric traitlets requests2 pathlib2 pexpect sqlite3 ]
       ++ optionals stdenv.isDarwin [appnope];
 
     LC_ALL="en_US.UTF-8";