diff --git a/Dockerfile b/Dockerfile
index e27188a..bb7d0ee 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -33,8 +33,8 @@ RUN set -ex \
 ENV LD_PRELOAD /lib/stack-fix.so
 
 RUN npm config set unsafe-perm true
+ENV CRYPTOGRAPHY_DONT_BUILD_RUST=1
 RUN apk update && \
-    export CRYPTOGRAPHY_DONT_BUILD_RUST=1 \
     apk add --no-cache docker-cli python3 && \
     apk add --no-cache --virtual .docker-compose-deps python3-dev libffi-dev openssl-dev gcc libc-dev make && \
     pip3 install docker-compose && \