diff --git a/steps/04-install-extras.sh b/steps/04-install-extras.sh
index d1f5546d..fc4b41fa 100755
--- a/steps/04-install-extras.sh
+++ b/steps/04-install-extras.sh
@@ -8,6 +8,7 @@ pushd "$SOURCE"
 
 case "$OS" in
   linux)
+    build/linux/sysroot_scripts/install-sysroot.py "--arch=$CPU"
     build/install-build-deps.sh
     gclient runhooks
     ;;