diff --git a/examples/python-poetry/devenv.nix b/examples/python-poetry/devenv.nix
index d33afb3f5..7cc7da82f 100644
--- a/examples/python-poetry/devenv.nix
+++ b/examples/python-poetry/devenv.nix
@@ -1,7 +1,7 @@
-{ pkgs, ... }:
+{ pkgs, lib, ... }:
 
 {
-  packages = [ pkgs.zlib ];
+  env.LD_LIBRARY_PATH = lib.makeLibraryPath [ pkgs.zlib ];
   languages.python = {
     enable = true;
     poetry.enable = true;