From b3b4b91ff8ccce43d6d8b722c7b2e9eb58973e0b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Daniel=20Gr=C3=B6ber?= <dxld@darkboxed.org>
Date: Fri, 6 Mar 2015 14:04:31 +0100
Subject: [PATCH] Fix sloppy recompilation checking in cabal-helper-wrapper

---
 CabalHelper/Wrapper.hs | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/CabalHelper/Wrapper.hs b/CabalHelper/Wrapper.hs
index 68601a9..880b28f 100644
--- a/CabalHelper/Wrapper.hs
+++ b/CabalHelper/Wrapper.hs
@@ -203,9 +203,13 @@ compile Compile {..} = do
     recompile <-
       case cabalSourceDir of
         Nothing -> do
-          tsrcs <- timeHsFiles cabalHelperSourceDir
-          texe <- timeMaybe exe
-          return $ any ((texe <) . Just) tsrcs
+          exists <- doesFileExist exe
+          case exists of
+            False -> return True
+            True -> do
+                tsrcs <- timeHsFiles cabalHelperSourceDir
+                texe <- timeFile exe
+                return $ any (texe <) tsrcs
         Just _ -> return True -- let ghc do the difficult recomp checking
 
     let Version (mj:mi:_) _ = cabalVersion