From 8e1ca187b3278a8f75a232877da181ce596cb9e4 Mon Sep 17 00:00:00 2001
From: Greg Weber <greg@gregweber.info>
Date: Tue, 27 Dec 2011 10:33:58 -0300
Subject: [PATCH] better error message for devel flags

---
 yesod/Devel.hs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/yesod/Devel.hs b/yesod/Devel.hs
index 780e440d..1e6d5651 100644
--- a/yesod/Devel.hs
+++ b/yesod/Devel.hs
@@ -197,7 +197,7 @@ checkCabalFile gpd = case D.condLibrary gpd of
     Just ct ->
       case lookupDevelLib ct of
         Nothing   -> do
-          putStrLn "Error: no library configuration for -fdevel"
+          putStrLn "Error: no development flag found in your configuration file. Expected a 'library-only' flag or the older 'devel' flag"
           exitFailure
         Just dLib ->
          case (D.hsSourceDirs . D.libBuildInfo) dLib of