diff --git a/jupyterlite_xeus/create_conda_env.py b/jupyterlite_xeus/create_conda_env.py
index 549275c..5d1daa3 100644
--- a/jupyterlite_xeus/create_conda_env.py
+++ b/jupyterlite_xeus/create_conda_env.py
@@ -52,7 +52,7 @@ def create_conda_env_from_env_file(root_prefix, env_file_content, env_file_locat
     # Force some build versions - This is a temporary watchdog for not pulling Python 3.12 packages that we don't support
     if "python" in str(specs):
         specs.append("python=3.11")
-        specs.append("pyjs=2.2.1=py311h37c3baf")
+        specs.append("pyjs=2.2.1=py311h37c3baf_0")
         specs.append("emscripten-abi=3.1.45")
 
     create_conda_env_from_specs(