diff --git a/InstallDetails.md b/InstallDetails.md
index 0950c1e..03290f3 100644
--- a/InstallDetails.md
+++ b/InstallDetails.md
@@ -179,7 +179,7 @@ The following procedure will install and run Tahoe on Windows.  Note that this a
 
 4. Open a command prompt and cd to the top of the Tahoe tree (e.g. cd \tahoe).
 
-5. Run "C:\Python26\python setup.py build". Wait a bit until it stops working. Note that you need a working network connection because it will download various dependencies.
+5. Run "C:\Python26\python setup.py build". Wait a bit until it stops working. Note that you need a working network connection because it will download various dependencies. Ignore any warnings referring to darcs.
 
 6. Run "C:\Python26\python setup.py install". Wait a bit until it stops working. Again, you may need a working network connection.