diff --git a/examples/where_is_my_output/BUILD b/examples/where_is_my_output/BUILD
index 848f98f9..2f4605e5 100644
--- a/examples/where_is_my_output/BUILD
+++ b/examples/where_is_my_output/BUILD
@@ -39,3 +39,18 @@ pkg_deb(
     package = "mwp",
     version = "3.14",
 )
+
+# We can also depend just on the .changes file
+
+filegroup(
+    name = "the_changes_file",
+    srcs = [":deb"],
+    output_group = "changes",
+)
+
+genrule(
+    name = "use_changes_file",
+    srcs = [":the_changes_file"],
+    outs = ["copy_of_changes.txt"],
+    cmd = "cp $(location :the_changes_file) $@",
+)
diff --git a/examples/where_is_my_output/README.md b/examples/where_is_my_output/README.md
index 7b2f351f..9b4e16dd 100644
--- a/examples/where_is_my_output/README.md
+++ b/examples/where_is_my_output/README.md
@@ -23,7 +23,7 @@ to inspect a target and print exactly what we need. Let's try it:
 
 ```shell
 bazel build :deb
-bazel cquery :deb --output=starlark --starlark:file=show_deb_outputs.bzl 2>/dev/null
+bazel cquery :deb --output=starlark --starlark:file=show_all_outputs.bzl 2>/dev/null
 ```
 
 That should produce something like
@@ -35,7 +35,7 @@ changes: bazel-out/k8-fastbuild/bin/mwp_3.changes
 
 ### How it works
 
-show_deb_outputs.bzl is a Starlark script that must contain a function with the
+show_all_outputs.bzl is a Starlark script that must contain a function with the
 name `format`, that takes a single argument. The argument is typically named
 target, and is a configured Bazel target, as you might have access to while
 writing a custom rule. We can inspect its providers and print them in a useful
@@ -43,7 +43,7 @@ way.
 
 For pkg_deb, there are two files, the .deb file and the .changes, and both are
 passed along in the rule's OutputGroupInfo provider. This snippet below (from
-show_deb_outputs.bzl) prints them.
+show_all_outputs.bzl) prints them.
 
 ```python
 def format(target):
@@ -64,3 +64,34 @@ def format(target):
 A full explanation of why this works is beyond the scope of this example. It
 requires some knowledge of how to write custom Bazel rules. See the Bazel
 documentation for more information.
+
+## Using an implicit output as input to another rule.
+
+Sometimes a rule will create an implicit output that the user does not
+explicitly specify as an attribute of the target. The .changes file from
+pkg_deb is an example. If we want another rule to depend on an implicitly
+created file, we can do that with a filegroup that specifies the specific
+output group containing that file.
+
+In the example below, `:deb` is a rule producing an explicit .deb output
+and an implict .changes output. We refer to the .changes file using the
+`filegroup` and specifying the desired output group name. Then, any rule
+can use this `filegroup` as an input.
+
+```python
+
+pkg_deb(name = "deb", ...)
+
+filegroup(
+    name = "the_changes_file",
+    srcs = [":deb"],
+    output_group = "changes",
+)
+
+genrule(
+    name = "use_changes_file",
+    srcs = [":the_changes_file"],
+    outs = ["copy_of_changes.txt"],
+    cmd = "cp $(location :the_changes_file) $@",
+)
+```
diff --git a/examples/where_is_my_output/show_deb_outputs.bzl b/examples/where_is_my_output/show_all_outputs.bzl
similarity index 93%
rename from examples/where_is_my_output/show_deb_outputs.bzl
rename to examples/where_is_my_output/show_all_outputs.bzl
index ad78f749..312a4ea4 100644
--- a/examples/where_is_my_output/show_deb_outputs.bzl
+++ b/examples/where_is_my_output/show_all_outputs.bzl
@@ -16,7 +16,7 @@
 # Extract the paths to the various outputs of pkg_deb
 #
 # Usage:
-#   bazel cquery //:debian --output=starlark --starlark:file=show_deb_outputs.bzl
+#   bazel cquery //:deb --output=starlark --starlark:file=show_all_outputs.bzl
 #
 
 def format(target):