diff --git a/Dockerfile b/Dockerfile
index 87ff176f9e1..1a9621c86c2 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -39,7 +39,7 @@ COPY --from=ui-builder /quickwit/quickwit-ui/build /quickwit/quickwit-ui/build
 WORKDIR /quickwit
 
 RUN echo "Building workspace with feature(s) '$CARGO_FEATURES' and profile '$CARGO_PROFILE'" \
-    && ENV RUSTFLAGS="--cfg tokio_unstable" \
+    && RUSTFLAGS="--cfg tokio_unstable" \
         cargo build \
         -p quickwit-cli \
         --features $CARGO_FEATURES \