diff --git a/pkgs/by-name/je/jefferson/package.nix b/pkgs/by-name/je/jefferson/package.nix
index 62e57693c5328..81b27588147ff 100644
--- a/pkgs/by-name/je/jefferson/package.nix
+++ b/pkgs/by-name/je/jefferson/package.nix
@@ -26,6 +26,8 @@ python3.pkgs.buildPythonApplication rec {
     lzallright
   ];
 
+  pythonRelaxDeps = [ "cstruct" ];
+
   pythonImportsCheck = [
     "jefferson"
   ];