diff --git a/ts/editor-toolbar/BUILD.bazel b/ts/editor-toolbar/BUILD.bazel
index d0b1a0ccf..3e0cbc8c9 100644
--- a/ts/editor-toolbar/BUILD.bazel
+++ b/ts/editor-toolbar/BUILD.bazel
@@ -99,7 +99,7 @@ esbuild(
     external = [
         "protobufjs/light",
     ],
-    output_css = True,
+    output_css = "editor-toolbar.css",
     visibility = ["//visibility:public"],
     deps = [
         "//ts/lib",