diff --git a/pkgs/development/python-modules/karton-core/default.nix b/pkgs/development/python-modules/karton-core/default.nix
index 1e32e25ca339..2e5742546175 100644
--- a/pkgs/development/python-modules/karton-core/default.nix
+++ b/pkgs/development/python-modules/karton-core/default.nix
@@ -26,6 +26,8 @@ buildPythonPackage rec {
 
   build-system = [ setuptools ];
 
+  pythonRelaxDeps = [ "boto3" ];
+
   dependencies = [
     boto3
     orjson