diff --git a/packages/bazel/src/ng_package/ng_package.bzl b/packages/bazel/src/ng_package/ng_package.bzl
index d20644134b760..f84d0471fc1e6 100644
--- a/packages/bazel/src/ng_package/ng_package.bzl
+++ b/packages/bazel/src/ng_package/ng_package.bzl
@@ -153,13 +153,14 @@ def _flatten_paths(directory):
             result.append(f.map.path)
     return result
 
-# takes an depset of files and returns an array that doesn't contain any generated files by ngc
-def _filter_out_generated_files(files, extension, filter_external_files):
+# Takes a depset of files and returns a depset that doesn't contain any generated files by NGC.
+# Optionally can filter out files that do not belong to a specified package path.
+def _filter_out_generated_files(files, extension, package_path = None):
     result = []
     for file in files:
-        # If the "filter_external_files" parameter has been set to true, filter out files
-        # that refer to external workspaces.
-        if filter_external_files and file.short_path.startswith("../"):
+        # If the "package_path" parameter has been specified, filter out files
+        # that do not start with the the specified package path.
+        if package_path and not file.short_path.startswith(package_path):
             continue
 
         # Filter out files that are generated by the Angular Compiler CLI.
@@ -184,9 +185,17 @@ def _filter_js_inputs(all_inputs):
 def _ng_package_impl(ctx):
     npm_package_directory = ctx.actions.declare_directory("%s.ng_pkg" % ctx.label.name)
 
-    esm_2015_files = _filter_out_generated_files(collect_es6_sources(ctx), "js", False)
-    esm5_sources = _filter_out_generated_files(flatten_esm5(ctx), "js", False)
-    type_definitions = _filter_out_generated_files(collect_type_definitions(ctx), "d.ts", True)
+    esm_2015_files = _filter_out_generated_files(collect_es6_sources(ctx), "js")
+    esm5_sources = _filter_out_generated_files(flatten_esm5(ctx), "js")
+
+    # Filter out all TypeScript definitions generated by NGC as well as definition files
+    # that do not belong to the current package. We only want to package types that belong
+    # to the current package.
+    type_definitions = _filter_out_generated_files(
+        collect_type_definitions(ctx),
+        "d.ts",
+        ctx.label.package,
+    )
 
     # These accumulators match the directory names where the files live in the
     # Angular package format.