diff --git a/ci/install.sh b/ci/install.sh
index 9000772307..98b6bd127e 100644
--- a/ci/install.sh
+++ b/ci/install.sh
@@ -1,10 +1,13 @@
 set -euxo pipefail
 
 main() {
-    if [ $TARGET != x86_64-unknown-linux-gnu ]; then
-        rustup target add $TARGET
+    if [ $TARGET = x86_64-unknown-linux-gnu ]; then
+        # needed by compiletest-rs
+        rustup component add rustc-dev
     fi
 
+    rustup target add $TARGET
+
     mkdir qemu
     curl -L https://github.com/japaric/qemu-bin/raw/master/14.04/qemu-system-arm-2.12.0 > qemu/qemu-system-arm
     chmod +x qemu/qemu-system-arm