diff --git a/python/dist/BUILD.bazel b/python/dist/BUILD.bazel
index 4330fe1c4f..ba549acb25 100644
--- a/python/dist/BUILD.bazel
+++ b/python/dist/BUILD.bazel
@@ -246,6 +246,7 @@ pkg_files(
         "//upb/mini_descriptor:source_files",
         "//upb/mini_table:source_files",
         "//upb/port:source_files",
+        "//upb/reflection:source_files",
         "//upb/text:source_files",
         "//upb/util:source_files",
         "//upb/wire:source_files",
diff --git a/upb/cmake/BUILD.bazel b/upb/cmake/BUILD.bazel
index b2a5e5a7f8..3e40380e8b 100644
--- a/upb/cmake/BUILD.bazel
+++ b/upb/cmake/BUILD.bazel
@@ -96,6 +96,7 @@ sh_test(
         "//upb/mini_descriptor:source_files",
         "//upb/mini_table:source_files",
         "//upb/port:source_files",
+        "//upb/reflection:source_files",
         "//upb/text:source_files",
         "//upb/wire:source_files",
         "@utf8_range//:utf8_range_srcs",
diff --git a/upb/reflection/BUILD b/upb/reflection/BUILD
index 380ae38e51..0e92276c44 100644
--- a/upb/reflection/BUILD
+++ b/upb/reflection/BUILD
@@ -172,3 +172,21 @@ cc_test(
         "@com_google_absl//absl/strings",
     ],
 )
+
+# begin:github_only
+filegroup(
+    name = "source_files",
+    srcs = glob(
+        [
+            "**/*.c",
+            "**/*.h",
+            "**/*.hpp",
+        ],
+        exclude = ["stage0/**"],
+    ),
+    visibility = [
+        "//upb/cmake:__pkg__",
+        "//python/dist:__pkg__",
+    ]
+)
+# end:github_only