diff --git a/ui/build/soong.go b/ui/build/soong.go
index c89f0d5..2ce1ac9 100644
--- a/ui/build/soong.go
+++ b/ui/build/soong.go
@@ -109,7 +109,8 @@
 		defer ctx.EndTrace()
 
 		fifo := filepath.Join(config.OutDir(), ".ninja_fifo")
-		status.NinjaReader(ctx, ctx.Status.StartTool(), fifo)
+		nr := status.NewNinjaReader(ctx, ctx.Status.StartTool(), fifo)
+		defer nr.Close()
 
 		cmd := Command(ctx, config, "soong "+name,
 			config.PrebuiltBuildTool("ninja"),