diff --git a/Dockerfile b/Dockerfile
index 8788f78..8470c59 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -80,13 +80,13 @@ ARG PACKAGE_BASEURL="http://download.onlyoffice.com/install/documentserver/linux
 
 ENV COMPANY_NAME=$COMPANY_NAME \
     PRODUCT_NAME=$PRODUCT_NAME \
-    PRODUCT_EDITION=$PRODUCT_EDITION
+    PRODUCT_EDITION=$PRODUCT_EDITION \
+    DS_DOCKER_INSTALLATION=true
 
 RUN PACKAGE_FILE="${COMPANY_NAME}-${PRODUCT_NAME}${PRODUCT_EDITION}${PACKAGE_VERSION:+_$PACKAGE_VERSION}_${TARGETARCH:-$(dpkg --print-architecture)}.deb" && \
     wget -q -P /tmp "$PACKAGE_BASEURL/$PACKAGE_FILE" && \
     apt-get -y update && \
     service postgresql start && \
-    export DOCKER_INSTALLATION=1 && \
     apt-get -yq install /tmp/$PACKAGE_FILE && \
     service postgresql stop && \
     service supervisor stop && \