diff --git a/src/compiler/spirv/BUILD.gn b/src/compiler/spirv/BUILD.gn
index 4183021..2b3a83f 100644
--- a/src/compiler/spirv/BUILD.gn
+++ b/src/compiler/spirv/BUILD.gn
@@ -19,6 +19,7 @@
 # FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 # IN THE SOFTWARE.
 
+import("//third_party/mako/py_srcs.gni")
 import("../../../mesa.gni")
 
 config("spirv_public_config") {
@@ -59,7 +60,7 @@
 
   outputs = [ "$target_gen_dir/$output_name" ]
 
-  inputs = [ "spirv.core.grammar.json" ]
+  inputs = [ "spirv.core.grammar.json" ] + third_party_mako_srcs
 
   args = [
     rebase_path(".") + "/spirv.core.grammar.json",