Add workaround for BROOKLYN-1 to README.md
diff --git a/README.md b/README.md
index 63425a7..b5ffd5a 100644
--- a/README.md
+++ b/README.md
@@ -48,6 +48,14 @@
* Alternatively, [download the latest release](https://github.com/brooklyncentral/brooklyn/tarball/master) (tgz),
* or, fork or clone the repo: `git clone git://github.com/brooklyncentral/brooklyn.git` then `mvn clean install`.
+Please note that there is a known issue with the build which may affect you when
+freshly-extracted source tree
+([BROOKLYN-1](https://issues.apache.org/jira/browse/BROOKLYN-1)). The workaround
+is to issue the command `mvn clean` on the fresh source tree - you should then
+be able to build without problem. Many in the Brooklyn community typically run
+`mvn clean install` and so there may be other idiosyncracies to which this
+workaround applies.
+
## Community
