diff --git a/ci/docker-rust/Dockerfile b/ci/docker-rust/Dockerfile
index f95f4f3895f7e0..a90acc96c8412f 100644
--- a/ci/docker-rust/Dockerfile
+++ b/ci/docker-rust/Dockerfile
@@ -4,7 +4,9 @@ RUN set -x && \
     apt update && \
     apt-get install apt-transport-https && \
     echo deb https://apt.buildkite.com/buildkite-agent stable main > /etc/apt/sources.list.d/buildkite-agent.list && \
+    echo deb http://apt.llvm.org/xenial/ llvm-toolchain-xenial-6.0 main > /etc/apt/sources.list.d/llvm.list && \
     apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 32A37959C2FA5C3C99EFBC32A79206696452D198 && \
+    wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | apt-key add - && \
     apt update && \
     apt install -y \
       buildkite-agent \