diff --git a/nodejs.Dockerfile b/nodejs.Dockerfile
index 7fabc8d..89fc2c6 100644
--- a/nodejs.Dockerfile
+++ b/nodejs.Dockerfile
@@ -25,8 +25,9 @@ RUN curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add - && \
     apt install yarn
 
 # Install bun
-RUN case $TARGETARCH in 'amd64') export target=linux-x64-baseline;; 'arm64') export target=linux-aarch64;; esac && \
-    curl -fLo bun-linux.zip https://github.com/oven-sh/bun/releases/download/bun-${BUN_VERSION}/bun-'$target'.zip && \
+RUN case $TARGETARCH in 'amd64') TARGET=linux-x64-baseline;; 'arm64') TARGET=linux-aarch64;; esac && \
+    echo "TARGET=$TARGET" && \
+    curl -fLo bun-linux.zip https://github.com/oven-sh/bun/releases/download/bun-${BUN_VERSION}/bun-$TARGET.zip && \
     unzip bun-linux.zip && \
     mv bun-linux/bun /usr/local/bin/bun && \
     rm bun-linux.zip