Make zlib a first class build citizen
diff --git a/tools/buildgen/generate_build_additions.sh b/tools/buildgen/generate_build_additions.sh
index a2cd824..c631713 100644
--- a/tools/buildgen/generate_build_additions.sh
+++ b/tools/buildgen/generate_build_additions.sh
@@ -28,7 +28,13 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-gen_build_yaml_dirs="src/boringssl test/core/end2end test/core/bad_client test/core/bad_ssl src/proto"
+gen_build_yaml_dirs="  \
+  src/boringssl        \
+  src/proto            \
+  src/zlib             \
+  test/core/bad_client \
+  test/core/bad_ssl    \
+  test/core/end2end"
 gen_build_files=""
 for gen_build_yaml in $gen_build_yaml_dirs
 do
@@ -36,3 +42,4 @@
   $gen_build_yaml/gen_build_yaml.py > $output_file
   gen_build_files="$gen_build_files $output_file"
 done
+