diff --git a/.devcontainer/cuda12.9-conda/devcontainer.json b/.devcontainer/cuda12.9-conda/devcontainer.json
index 1dbfc769..d4f51422 100644
--- a/.devcontainer/cuda12.9-conda/devcontainer.json
+++ b/.devcontainer/cuda12.9-conda/devcontainer.json
@@ -15,6 +15,7 @@
     "--ulimit",
     "nofile=500000"
   ],
+  "containerEnv": {"PYTHON_VERSION": "3.13"},
   "hostRequirements": {"gpu": "optional"},
   "features": {
     "./features/src/cuda": {
diff --git a/.devcontainer/cuda13.0-conda/devcontainer.json b/.devcontainer/cuda13.0-conda/devcontainer.json
index e3723b08..5d585146 100644
--- a/.devcontainer/cuda13.0-conda/devcontainer.json
+++ b/.devcontainer/cuda13.0-conda/devcontainer.json
@@ -15,6 +15,7 @@
     "--ulimit",
     "nofile=500000"
   ],
+  "containerEnv": {"PYTHON_VERSION": "3.13"},
   "hostRequirements": {"gpu": "optional"},
   "features": {
     "./features/src/cuda": {
diff --git a/.devcontainer/cuda13.1-conda/devcontainer.json b/.devcontainer/cuda13.1-conda/devcontainer.json
index 4bccee23..9852ff2a 100644
--- a/.devcontainer/cuda13.1-conda/devcontainer.json
+++ b/.devcontainer/cuda13.1-conda/devcontainer.json
@@ -15,6 +15,7 @@
     "--ulimit",
     "nofile=500000"
   ],
+  "containerEnv": {"PYTHON_VERSION": "3.13"},
   "hostRequirements": {"gpu": "optional"},
   "features": {
     "./features/src/cuda": {