Added minimal README.md

examples/crate_universe_failure/serde_derive/README.md

@@ -0,0 +1,23 @@
+# Crate Universe `serde_derive` Bug
+
+Running:
+
+```bash
+bazel build //serde_dorive:main
+```
+
+works on OSX but fails on Linux:
+
+```
+error: proc-macro derive panicked
+ --> serde_derive/src/main.rs:3:10
+  |
+3 | #[derive(Serialize, Deserialize, Debug)]
+  |          ^^^^^^^^^
+  |
+  = help: message: file missing from serde_derive manifest directory during macro expansion: /home/ttiurani/.cache/bazel/_bazel_ttiurani/22abf7e408f71b2ff7508bf4d49c9362/sandbox/linux-sandbox/3/execroot/failure/external/crate_index_serde_derive__serde_derive-1.0.183/serde_derive-x86_64-unknown-linux-gnu
+```
+
+This happens despite the merge of PR: https://github.com/bazelbuild/rules_rust/pull/2097
+
+Issue: https://github.com/bazelbuild/rules_rust/issues/2071