diff --git a/pkgs/development/python-modules/google-auth/default.nix b/pkgs/development/python-modules/google-auth/default.nix
index 22b02552cd7..d583de9c074 100644
--- a/pkgs/development/python-modules/google-auth/default.nix
+++ b/pkgs/development/python-modules/google-auth/default.nix
@@ -12,6 +12,7 @@
 , pytest-localserver
 , responses
 , rsa
+, six
 }:
 
 buildPythonPackage rec {
@@ -23,7 +24,7 @@ buildPythonPackage rec {
     sha256 = "0bmdqkyv8k8n6s8dss4zpbcq1cdxwicpb42kwybd02ia85mh43hb";
   };
 
-  propagatedBuildInputs = [ pyasn1-modules cachetools rsa ];
+  propagatedBuildInputs = [ pyasn1-modules cachetools rsa six ];
 
   checkInputs = [
     flask