diff --git a/Dockerfile b/Dockerfile
index d01d49a..e2579bf 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -5,11 +5,11 @@ LABEL maintainer="guillaume@van-hemmen.com"
 ARG ARG_TZ="Europe/Paris"
 ARG ARG_NODE_MAJOR=18
 
-RUN ln -snf /usr/share/zoneinfo/$CI_TZ /etc/localtime && echo $CI_TZ > /etc/timezone && \
+RUN ln -snf /usr/share/zoneinfo/$ARG_TZ /etc/localtime && echo $ARG_TZ > /etc/timezone && \
     apt-get update && apt-get install -y ca-certificates curl gnupg && \
     mkdir -p /etc/apt/keyrings && \
     curl -fsSL https://deb.nodesource.com/gpgkey/nodesource-repo.gpg.key | gpg --dearmor -o /etc/apt/keyrings/nodesource.gpg && \
-    echo "deb [signed-by=/etc/apt/keyrings/nodesource.gpg] https://deb.nodesource.com/node_${CI_NODE_MAJOR}.x nodistro main" | tee /etc/apt/sources.list.d/nodesource.list && \
+    echo "deb [signed-by=/etc/apt/keyrings/nodesource.gpg] https://deb.nodesource.com/node_${ARG_NODE_MAJOR}.x nodistro main" | tee /etc/apt/sources.list.d/nodesource.list && \
     apt-get update && apt-get install -y nodejs sudo && \
     apt-get install -y \
                   ca-certificates \