diff --git a/package.json b/package.json
index f081457865..cb339cd748 100644
--- a/package.json
+++ b/package.json
@@ -91,6 +91,7 @@
     "license-checker": "^20.1.0",
     "minimatch": "^3.0.4",
     "minimist": "^1.2.0",
+    "rxjs": "^6.0.0",
     "semver": "^5.3.0",
     "source-map": "^0.5.6",
     "source-map-support": "^0.5.0",
diff --git a/packages/angular_devkit/core/BUILD b/packages/angular_devkit/core/BUILD
index 5ea9419d3e..c5213e49e5 100644
--- a/packages/angular_devkit/core/BUILD
+++ b/packages/angular_devkit/core/BUILD
@@ -9,7 +9,6 @@ load("@build_bazel_rules_nodejs//:defs.bzl", "jasmine_node_test")
 
 licenses(["notice"])  # MIT License
 
-
 # @angular-devkit/core
 
 ts_library(