diff --git a/hackage-db.cabal b/hackage-db.cabal
--- a/hackage-db.cabal
+++ b/hackage-db.cabal
@@ -1,5 +1,5 @@
 Name:                   hackage-db
-Version:                1.6
+Version:                1.7
 Copyright:              Peter Simons
 License:                BSD3
 License-File:           LICENSE
@@ -10,7 +10,7 @@
 Synopsis:               provide access to the Hackage database via Data.Map
 Cabal-Version:          >= 1.6
 Build-Type:             Simple
-Tested-With:            GHC >= 6.12.3 && <= 7.6.2
+Tested-With:            GHC >= 6.12.3 && <= 7.6.3
 Description:
    This module provides simple access to the Hackage database by means
    of @Data.Map@. Suppose you wanted to implement a utility that queries
@@ -38,6 +38,8 @@
    Note that once the database has been parsed, it can be accessed
    quickly, but the inital cost of reading @00-index.tar@ is fairly
    high.
+   .
+   This package is known to work on Linux and Mac OS X, but not Windows.
 
 Source-Repository head
   Type:                 git
@@ -49,3 +51,5 @@
   hs-source-dirs:       src
   Ghc-Options:          -Wall
   Exposed-Modules:      Distribution.Hackage.DB
+  if os(darwin)
+    Cpp-Options:          -DIS_DARWIN
diff --git a/src/Distribution/Hackage/DB.hs b/src/Distribution/Hackage/DB.hs
--- a/src/Distribution/Hackage/DB.hs
+++ b/src/Distribution/Hackage/DB.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE CPP #-}
 {- |
    Module      :  Distribution.Hackage.DB
    License     :  BSD3
@@ -43,14 +44,20 @@
 type Hackage = Map String (Map Version GenericPackageDescription)
 
 -- | Read the Hackage database from
--- @$HOME\/.cabal\/packages\/hackage.haskell.org\/00-index.tar@ and
+-- @$HOME\/@/<package database path>/@\/hackage.haskell.org\/00-index.tar@ and
 -- return a 'Map' that provides fast access to its contents. That @tar@
 -- file is typically created by running the command @\"cabal update\"@.
 
 readHackage :: IO Hackage
 readHackage = do
   homedir <- getHomeDirectory
-  readHackage' (joinPath [ homedir, ".cabal", "packages", "hackage.haskell.org", "00-index.tar" ])
+  readHackage' (joinPath [ homedir,
+#ifdef IS_DARWIN
+    "Library", "Haskell", "repo-cache"
+#else
+    ".cabal", "packages"
+#endif
+    , "hackage.haskell.org", "00-index.tar" ])
 
 -- | Read the Hackage database from the given 'FilePath' and return a
 -- 'Hackage' map that provides fast access to its contents.