Source: etcd Version: 2.2.0+dfsg-2 It failed to build:
https://buildd.debian.org/status/package.php?p=etcd&suite=sid In each case the error was: # github.com/boltdb/bolt src/github.com/boltdb/bolt/db.go:85: undefined: maxMapSize src/github.com/boltdb/bolt/db.go:85: invalid array bound maxMapSize It appears that this may have been fixed upstream, though the patch is not exactly perspicuous: https://github.com/glevand/coreos--coreos-overlay/commit/5ecd5f6be491e50fc55a9ad1fbfd89dd21ee988c
