Hi! On Sat, Feb 20, 2010 at 9:21 PM, Paul <paul at all-the-johnsons.co.uk> wrote: > ... > Any ideas if it's me or not? > It's a bug: http://jira.codehaus.org/browse/BOO-1282 The workaround is to remove any existing Boo.Lang.Extensions from the gac before building.