diff --git a/src/build.sh b/src/build.sh
index b71f2a30..3ce70ce9 100755
--- a/src/build.sh
+++ b/src/build.sh
@@ -15,5 +15,5 @@ done
 base_dir=$(cd "$(dirname "$loc")" && pwd)
 
 pushd "$base_dir"
-${BAZEL_EXECUTABLE:-bazel} build //src:djinni
+${BAZEL_EXECUTABLE:-bazel} build //src:djinni --host_conlyopt=-std=c90
 popd