diff --git a/kokoro/linux-clang-gn/build-docker.sh b/kokoro/linux-clang-gn/build-docker.sh
index d00d2759..6540b1be 100755
--- a/kokoro/linux-clang-gn/build-docker.sh
+++ b/kokoro/linux-clang-gn/build-docker.sh
@@ -34,8 +34,13 @@
 # POSSIBILITY OF SUCH DAMAGE.
 
 set -e # Fail on any error.
+
+. /bin/using.sh # Declare the bash `using` function for configuring toolchains.
+
 set -x # Display commands being run.
 
+using ninja-1.10.0
+
 # Disable git's "detected dubious ownership" error - kokoro checks out the repo
 # with a different user, and we don't care about this warning.
 git config --global --add safe.directory '*'