diff --git a/Dockerfile b/Dockerfile
index 3cfdd8f..01ccc9f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -26,13 +26,14 @@ RUN apk update && apk add --no-cache \
 # Environment for NVM and Node.js installation
 ENV NVM_DIR="/root/.nvm"
 ENV NODE_VERSION="20"
+# Set unofficial Node.js builds mirror for musl
+ENV NVM_NODEJS_ORG_MIRROR="https://unofficial-builds.nodejs.org/download/release"
 
 # Install NVM and configure the environment
 RUN curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.7/install.sh | bash \
     && echo 'export NVM_DIR="/root/.nvm"' >> /etc/profile.d/nvm.sh \
     && echo '[ -s "/root/.nvm/nvm.sh" ] && \. "/root/.nvm/nvm.sh"' >> /etc/profile.d/nvm.sh \
     && echo "nvm_get_arch() { nvm_echo 'x64-musl'; }" >> /root/.nvm/nvm.sh \
-    && echo 'export NVM_NODEJS_ORG_MIRROR=https://unofficial-builds.nodejs.org/download/release' >> /root/.nvm/nvm.sh \
     && . /etc/profile.d/nvm.sh \
     && latest_version=$(curl -s https://unofficial-builds.nodejs.org/download/release/ | grep -o "v${NODE_VERSION}\.[0-9]*\.[0-9]*" | sort -V | tail -n1) \
     && nvm install $latest_version \