diff --git a/Dockerfile.armv7l b/Dockerfile.armv7l
index 7b6b1df..66c63ef 100644
--- a/Dockerfile.armv7l
+++ b/Dockerfile.armv7l
@@ -19,6 +19,7 @@ RUN if [ "$PYTHON_VERSION" != "3.7" ]; then \
         uv python install "$PYTHON_VERSION"; \
         apt-get update && \
             apt-get install --no-install-recommends -y \
+            build-essential \
             clang && \
             apt-get clean && \
             rm -rf /var/lib/apt/lists/*; \