diff --git a/python/repositories.bzl b/python/repositories.bzl
index 1441432547..50610782e9 100644
--- a/python/repositories.bzl
+++ b/python/repositories.bzl
@@ -140,6 +140,8 @@ filegroup(
             "Scripts/**",
             "share/**",
         ],
+        # Platform-agnostic filegroup can't match on all patterns.
+        allow_empty = True,
         exclude = [
             "**/* *", # Bazel does not support spaces in file names.
         ],