diff --git a/sorted_set.txt b/sorted_set.txt
new file mode 100644
index 0000000000000000000000000000000000000000..5adc2f47570ea93642b9b6acced776c333797a42
--- /dev/null
+++ b/sorted_set.txt
@@ -0,0 +1,3 @@
+Note that sorted_set has been removed from the standard library. It needs to be
+packaged separately, and when that's done this package will need an explicit
+dependency on it.
diff --git a/webrick.txt b/webrick.txt
new file mode 100644
index 0000000000000000000000000000000000000000..df027ea892a26c59446c629bb9ae65842779cdb6
--- /dev/null
+++ b/webrick.txt
@@ -0,0 +1,3 @@
+Note that webrick has been removed from the standard library. It's
+already been packaged and is currently in NEW, but this package now
+needs an explicit dependency on it.