diff --git a/ci/docker/Dockerfile.build.ubuntu_nightly_cpu b/ci/docker/Dockerfile.build.ubuntu_nightly_cpu
index 5e72a0a309b1..58ff33e3013b 100755
--- a/ci/docker/Dockerfile.build.ubuntu_nightly_cpu
+++ b/ci/docker/Dockerfile.build.ubuntu_nightly_cpu
@@ -36,9 +36,9 @@ COPY install/sbt.gpg /work/
 RUN /work/ubuntu_scala.sh
 
 COPY install/ubuntu_r.sh /work/
+COPY install/r.gpg /work/
 RUN /work/ubuntu_r.sh
 
-COPY install/r.gpg /work/
 COPY install/ubuntu_perl.sh /work/
 RUN /work/ubuntu_perl.sh