diff --git a/Dockerfile.builder b/Dockerfile.builder
index b97e965..9e2f8f8 100644
--- a/Dockerfile.builder
+++ b/Dockerfile.builder
@@ -4,6 +4,7 @@ RUN apt-get update && \
     apt-get install -y curl \
     make \
     clang \
+    pkg-config \
     libxcb-cursor-dev \
     rustup && \
     rustup default stable