diff --git a/alsa-mixer.cabal b/alsa-mixer.cabal
--- a/alsa-mixer.cabal
+++ b/alsa-mixer.cabal
@@ -1,5 +1,5 @@
 Name:                alsa-mixer
-Version:             0.2.0.1
+Version:             0.2.0.2
 Synopsis:            Bindings to the ALSA simple mixer API.
 Description:         This package provides bindings to the ALSA simple mixer API.
 License:             BSD3
@@ -25,4 +25,4 @@
   Extra-libraries:     asound
   Build-depends:       base == 4.*,
                        alsa-core == 0.5.*,
-                       unix == 2.6.*
+                       unix >= 2.6 && < 3