coreos/coreos-overlay — pull request #539 by marineam (2014-04-09 22:03:18+00:00)
Title: Xenstore

Haven't actually tried using it yet but it builds and is super tiny:

```
20K	/usr/bin/xenstore
28K	/usr/lib64/libxenstore.so.3.0.3
48K	total
```

A bit of an improvement over a full xen-tools install :-D