Fix RTS stats

shake/Main.hs

@@ -320,9 +320,9 @@ buildRules nofib@Build{..} = do
         need [takeDirectory out </> "config.txt"]
         need [replaceExtensions out exe]
         let test = unoutput out
-            rtsStatsOut = out <.> "stats"
         (stdin, args) <- liftIO $ getTestCmdline nofib test
         executable <- liftIO $ IO.canonicalizePath $ output </> test </> "Main" <.> exe
+        let rtsStatsOut = executable <.> "stats"
         out' <- liftIO $ IO.canonicalizePath out
         cmd_ (Cwd test) (EchoStdout False) (StdinBS stdin)
             "valgrind" "--tool=cachegrind" cachegrind_args ("--cachegrind-out-file="++out')