diff --git a/Dockerfile b/Dockerfile
index 89e3145..4bd1ee4 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -17,7 +17,7 @@ LABEL org.opencontainers.image.created="${BUILD_DATE}"
 LABEL org.opencontainers.image.revision="${GIT_COMMIT}"
 LABEL org.opencontainers.image.source="https://git.kubistudio.cloud/kubistudio/cicd-multi-env-pipeline-poc"
 
-RUN apk add --no-cache curl gettext
+RUN apk add --no-cache curl
 
 COPY nginx.conf /etc/nginx/nginx.conf
 COPY src/ /usr/share/nginx/html/
diff --git a/docker-entrypoint.sh b/docker-entrypoint.sh
index f2dd1ef..a278378 100644
--- a/docker-entrypoint.sh
+++ b/docker-entrypoint.sh
@@ -21,9 +21,9 @@ window.__ENV__ = {
 };
 EOF
 
-export APP_ENV APP_VERSION
-
-envsubst '${APP_ENV} ${APP_VERSION}' < /etc/nginx/nginx.conf > /etc/nginx/nginx.conf.tmp
-mv /etc/nginx/nginx.conf.tmp /etc/nginx/nginx.conf
+sed -i \
+  -e "s/\${APP_ENV:-development}/${APP_ENV}/g" \
+  -e "s/\${APP_VERSION:-0.0.0}/${APP_VERSION}/g" \
+  /etc/nginx/nginx.conf
 
 exec "$@"