diff --git a/pkgs/tools/security/pius/default.nix b/pkgs/tools/security/pius/default.nix
index 2a48bf2c2c6..0fcf5d9a799 100644
--- a/pkgs/tools/security/pius/default.nix
+++ b/pkgs/tools/security/pius/default.nix
@@ -18,7 +18,8 @@ pythonPackages.buildPythonApplication {
     done
   '';
 
-  buildInputs = [ perl ];
+  nativeBuildInputs = [ perl ];
+  propagatedBuildInputs = with pythonPackages; [ six ];
 
   meta = {
     homepage = https://www.phildev.net/pius/;