diff --git a/ui/metrics/metrics_proto/metrics.pb.go b/ui/metrics/metrics_proto/metrics.pb.go
index 4ad4a7b..f869b72 100644
--- a/ui/metrics/metrics_proto/metrics.pb.go
+++ b/ui/metrics/metrics_proto/metrics.pb.go
@@ -164,6 +164,7 @@
 	BuildConfig_NOT_USED           BuildConfig_NinjaWeightListSource = 0
 	BuildConfig_NINJA_LOG          BuildConfig_NinjaWeightListSource = 1
 	BuildConfig_EVENLY_DISTRIBUTED BuildConfig_NinjaWeightListSource = 2
+	BuildConfig_EXTERNAL_FILE      BuildConfig_NinjaWeightListSource = 3
 )
 
 // Enum value maps for BuildConfig_NinjaWeightListSource.
@@ -172,11 +173,13 @@
 		0: "NOT_USED",
 		1: "NINJA_LOG",
 		2: "EVENLY_DISTRIBUTED",
+		3: "EXTERNAL_FILE",
 	}
 	BuildConfig_NinjaWeightListSource_value = map[string]int32{
 		"NOT_USED":           0,
 		"NINJA_LOG":          1,
 		"EVENLY_DISTRIBUTED": 2,
+		"EXTERNAL_FILE":      3,
 	}
 )
 
@@ -709,6 +712,7 @@
 	// NOT_USED - ninja doesn't use weight list.
 	// NINJA_LOG - ninja uses weight list based on previous builds by ninja log
 	// EVENLY_DISTRIBUTED - ninja thinks every task has the same weight.
+	// EXTERNAL_FILE - ninja uses an external custom weight list
 	NinjaWeightListSource *BuildConfig_NinjaWeightListSource `protobuf:"varint,8,opt,name=ninja_weight_list_source,json=ninjaWeightListSource,enum=soong_build_metrics.BuildConfig_NinjaWeightListSource,def=0" json:"ninja_weight_list_source,omitempty"`
 }
 
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 }
 
 var (
diff --git a/ui/metrics/metrics_proto/metrics.proto b/ui/metrics/metrics_proto/metrics.proto
index 5e9a055..7e5516d 100644
--- a/ui/metrics/metrics_proto/metrics.proto
+++ b/ui/metrics/metrics_proto/metrics.proto
@@ -138,6 +138,7 @@
     NOT_USED = 0;
     NINJA_LOG = 1;
     EVENLY_DISTRIBUTED = 2;
+    EXTERNAL_FILE = 3;
   }
 
   optional bool use_goma = 1;
@@ -163,6 +164,7 @@
   // NOT_USED - ninja doesn't use weight list.
   // NINJA_LOG - ninja uses weight list based on previous builds by ninja log
   // EVENLY_DISTRIBUTED - ninja thinks every task has the same weight.
+  // EXTERNAL_FILE - ninja uses an external custom weight list
   optional NinjaWeightListSource ninja_weight_list_source = 8 [default = NOT_USED];
 }