diff --git a/.gitignore b/.gitignore
index fc29d1d1a..6ff1b566e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -50,4 +50,5 @@ beacon_chain/sync_protocol.nim.generated.nim
 
 /dist
 /benchmark_results
+/.update.timestamp
 
diff --git a/vendor/nimbus-build-system b/vendor/nimbus-build-system
index a9a8e59b5..e2de003ce 160000
--- a/vendor/nimbus-build-system
+++ b/vendor/nimbus-build-system
@@ -1 +1 @@
-Subproject commit a9a8e59b569dc72b576e3d5b94108181fa46f313
+Subproject commit e2de003ce634deca72dab3b3c79426698e7b8579