diff -r 5bff70ff0431 -r f0a3918abd42 hgext/convert/darcs.py
--- a/hgext/convert/darcs.py	Sun Oct 28 09:47:54 2007 +0100
+++ b/hgext/convert/darcs.py	Tue Oct 30 22:14:15 2007 +0100
@@ -1,6 +1,6 @@
 # darcs support for the convert extension
 
-from common import NoRepo, commit, converter_source
+from common import NoRepo, commit, converter_source, checktool
 from mercurial.i18n import _
 from mercurial import util
 import os, shutil, tempfile
@@ -24,6 +24,8 @@
         if not os.path.exists(os.path.join(path, '_darcs', 'inventory')):
             raise NoRepo("couldn't open darcs repo %s" % path)
 
+        checktool('darcs')
+
         if ElementTree is None:
             raise util.Abort(_("Python ElementTree module is not available"))