diff --git a/Dockerfile b/Dockerfile
index bc8eb52b..67224840 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -17,6 +17,7 @@ ENV BUNDLE_FORCE_RUBY_PLATFORM 1
 ENV BUNDLE_WITHOUT "development:test:doc"
 ENV MAKEFLAGS "-j$(nproc)"
 COPY Gemfile Gemfile.lock /voctoweb/
+SHELL ["/bin/ash", "-eo", "pipefail", "-c"]
 RUN set -eux; \
 	apk add --no-cache --virtual .build-deps \
 		g++ \