diff --git a/nemesis.cabal b/nemesis.cabal
--- a/nemesis.cabal
+++ b/nemesis.cabal
@@ -1,5 +1,5 @@
 Name:                 nemesis
-Version:              2013.7.27
+Version:              2014.5.19
 Build-type:           Simple
 Synopsis:             a task management tool for Haskell
 Description:          Organize common shell tasks into a meaningful tree like structure with dependency tracking
@@ -20,7 +20,7 @@
                     , test/N1.hs
                     , test/N2.hs
                     , test/N3.hs
-                    
+
 source-repository head
   type: git
   location: https://github.com/nfjinjing/nemesis.git
@@ -32,18 +32,16 @@
                     , mtl
                     , process
                     , containers
-                    , air >= 2013.7.18
+                    , air >= 2014.5.19
+                    , air-th
                     , dlist
                     , Glob
                     , directory
-                      
+
   hs-source-dirs: src/
-  exposed-modules:  
+  exposed-modules:
                       System.Nemesis
                       System.Nemesis.DSL
                       System.Nemesis.Env
   other-modules:
                       System.Nemesis.Util
-                      
-   
-
diff --git a/src/System/Nemesis.hs b/src/System/Nemesis.hs
--- a/src/System/Nemesis.hs
+++ b/src/System/Nemesis.hs
@@ -72,14 +72,14 @@
   case args of
     [] -> help
     _target:_ -> execStateT unit def {target = _target} >>= run_nemesis
-  
+
   where
     help = execStateT unit def >>= list_task
     list_task n = do
       let _tasks = n.tasks.elems
-      
+
           _task_len = _tasks.map (full_name > length) .maximum + 5
-      
+
       br
       n.tasks.elems.sort.map (show_with_ljust _task_len) .mapM_ putStrLn
       br
@@ -110,7 +110,7 @@
       where
         bye = do
           printf "%s does not exist!" s
-          
+
 
     run_task :: Task -> IO ()
     run_task t = t.deps.mapM_ run' >> t.action.unShowIO