diff --git a/.gitignore b/.gitignore
index 9b4db458..ddf28a9c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,3 +4,5 @@ fceux-am
 verilog
 .metals
 .bloop
+out
+build.sc
diff --git a/npc/csrc/include/config.h b/npc/csrc/include/config.h
index 1db93aa9..90a38c2f 100644
--- a/npc/csrc/include/config.h
+++ b/npc/csrc/include/config.h
@@ -2,7 +2,7 @@
 #define __CONFIG_H__
 
 // #define HAS_NVBOARD
-#define DIFFTEST
+// #define DIFFTEST
 // #define ITRACE
 #define PERF