diff --git a/cmd/soong_build/main.go b/cmd/soong_build/main.go
index 577c6cc..5b1ae54 100644
--- a/cmd/soong_build/main.go
+++ b/cmd/soong_build/main.go
@@ -375,6 +375,7 @@
 	ctx.Register()
 	finalOutputFile, ninjaDeps := runSoongOnlyBuild(ctx)
 
+	ninjaDeps = append(ninjaDeps, configuration.ProductVariablesFileName)
 	ninjaDeps = append(ninjaDeps, usedEnvFile)
 	if shared.IsDebugging() {
 		// Add a non-existent file to the dependencies so that soong_build will rerun when the debugger is