diff --git a/ci/Dockerfile b/ci/Dockerfile
index 55c7d61..c2b8a41 100644
--- a/ci/Dockerfile
+++ b/ci/Dockerfile
@@ -8,7 +8,7 @@ USER root
 
 ENV QUARTO_CLI=https://github.com/quarto-dev/quarto-cli/releases/download/v1.3.433/quarto-1.3.433-linux-amd64.deb
 
-ENV CODE_EXT_DIR=/opt/code-server/extensions
+ENV VSCODE_EXT_DIR=/opt/code-server/extensions
 RUN mkdir -p ${VSCODE_EXT_DIR} && chown -R ${NB_USER}: ${VSCODE_EXT_DIR}
     
 RUN wget -O /tmp/quarto.deb ${QUARTO_CLI} && dpkg -i /tmp/quarto.deb && rm -rf /tmp/quarto.deb && apt-get clean