diff --git a/nptools.cabal b/nptools.cabal
--- a/nptools.cabal
+++ b/nptools.cabal
@@ -1,6 +1,6 @@
 Name:           nptools
 Cabal-Version:  >=1.4
-Version:        0.2.2
+Version:        0.3.0
 License:        BSD3
 License-File:   LICENSE
 Copyright:      (c) Nicolas Pouillard
@@ -74,11 +74,6 @@
 
 executable summ
     main-is: summ.hs
-    Build-depends: base>=3&&<5
-    ghc-options: -Wall -Odph
-
-executable tac
-    main-is: tac.hs
     Build-depends: base>=3&&<5
     ghc-options: -Wall -Odph
 
diff --git a/tac.hs b/tac.hs
deleted file mode 100644
--- a/tac.hs
+++ /dev/null
@@ -1,10 +0,0 @@
-import qualified Data.ByteString.Char8 as S
-import System.Environment
-import Control.Monad
-
-main :: IO ()
-main = do args <- getArgs
-          when (null args)  $ tac =<< S.getContents
-          forM_ args        $ tac <=< S.readFile
-  where tac  = S.putStr . S.intercalate nl . reverse . S.split '\n'
-        nl   = S.pack "\n"