diff --git a/snap/snapcraft.yaml b/snap/snapcraft.yaml
index c6d9ad8b0..3d4ec4b5d 100644
--- a/snap/snapcraft.yaml
+++ b/snap/snapcraft.yaml
@@ -85,7 +85,7 @@ parts:
       # stability of fetching the rust crates needed to build the cryptography
       # library.
       - CARGO_NET_GIT_FETCH_WITH_CLI: "true"
-      - SNAPCRAFT_PYTHON_VENV_ARGS: --upgrade
+      - PARTS_PYTHON_VENV_ARGS: --upgrade
       # Constraints are passed through the environment variable PIP_CONSTRAINTS instead of using the
       # parts.[part_name].constraints option available in snapcraft.yaml when the Python plugin is
       # used. This is done to let these constraints be applied not only on the certbot package