diff --git a/pkgs/development/python-modules/globus-sdk/default.nix b/pkgs/development/python-modules/globus-sdk/default.nix
index 1d2ee112a439..af46b9c675ff 100644
--- a/pkgs/development/python-modules/globus-sdk/default.nix
+++ b/pkgs/development/python-modules/globus-sdk/default.nix
@@ -8,6 +8,7 @@
 , pythonOlder
 , requests
 , responses
+, six
 , typing-extensions
 }:
 
@@ -37,6 +38,7 @@ buildPythonPackage rec {
     mypy
     pytestCheckHook
     responses
+    six
   ];
 
   postPatch = ''