diff --git a/server/camlistored/ui/closure/closure.go b/server/camlistored/ui/closure/closure.go
new file mode 100644
index 000000000..f41f07f5e
--- /dev/null
+++ b/server/camlistored/ui/closure/closure.go
@@ -0,0 +1,36 @@
+/*
+Copyright 2013 Google Inc.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+     http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package closure
+
+import (
+	"archive/zip"
+	"errors"
+	"os"
+)
+
+// ZipData is either the empty string (when compiling with "go get",
+// or the dev-server), or is initialized to a base64-encoded zip file
+// of the Closure library (when using make.go, which puts an extra
+// file in this package containing an init function to set ZipData).
+var ZipData string
+
+func Zip() (*zip.Reader, error) {
+	if ZipData == "" {
+		return nil, os.ErrNotExist
+	}
+	return nil, errors.New("TODO: implement")
+}