diff --git a/cab.cabal b/cab.cabal
--- a/cab.cabal
+++ b/cab.cabal
@@ -1,5 +1,5 @@
 Name:                   cab
-Version:                0.2.12
+Version:                0.2.13
 Author:                 Kazu Yamamoto <kazu@iij.ad.jp>
 Maintainer:             Kazu Yamamoto <kazu@iij.ad.jp>
 License:                BSD3
@@ -44,9 +44,7 @@
 Executable cab
   Default-Language:     Haskell2010
   Main-Is:              Main.hs
-  GHC-Options:          -Wall
-  if os(windows)
-    GHC-Options:        -threaded
+  GHC-Options:          -Wall -threaded
   HS-Source-Dirs:       src
   Build-Depends:        base >= 4.0 && < 5
                       , cab