diff --git a/Network/Wai/Middleware/Static.hs b/Network/Wai/Middleware/Static.hs
--- a/Network/Wai/Middleware/Static.hs
+++ b/Network/Wai/Middleware/Static.hs
@@ -33,11 +33,10 @@
 import Network.HTTP.Types (status200, status304)
 import Network.HTTP.Types.Header (RequestHeaders)
 import Network.Wai
-import System.Directory (doesFileExist)
+import System.Directory (doesFileExist, getModificationTime)
 #if !(MIN_VERSION_time(1,5,0))
 import System.Locale
 #endif
-import System.Posix.Files
 import qualified Crypto.Hash.SHA1 as SHA1
 import qualified Data.ByteString as B
 import qualified Data.ByteString as BS
@@ -253,7 +252,7 @@
 
 computeFileMeta :: FilePath -> IO FileMeta
 computeFileMeta fp =
-    do mtime <- getModTime fp
+    do mtime <- getModificationTime fp
        ct <- BSL.readFile fp
        return $ FileMeta
                 { fm_lastModified =
@@ -261,11 +260,6 @@
                 , fm_etag = B16.encode (SHA1.hashlazy ct)
                 , fm_fileName = fp
                 }
-
-getModTime :: FilePath -> IO UTCTime
-getModTime fullFilePath =
-    do stat <- getFileStatus fullFilePath
-       return $ (\t -> posixSecondsToUTCTime (realToFrac t :: POSIXTime)) $ modificationTime stat
 
 type Ascii = B.ByteString
 
diff --git a/changelog.md b/changelog.md
--- a/changelog.md
+++ b/changelog.md
@@ -1,3 +1,7 @@
+## 0.7.0.1
+* Fixed Windows build (by replacing `unix` dependency with equivalent `directory`
+  function)
+
 ## 0.7.0.0
 * Implement caching [agrafix]
 * Include mp4 and ogv mime_types [DrBoolean]
diff --git a/wai-middleware-static.cabal b/wai-middleware-static.cabal
--- a/wai-middleware-static.cabal
+++ b/wai-middleware-static.cabal
@@ -1,5 +1,5 @@
 Name:                wai-middleware-static
-Version:             0.7.0.0
+Version:             0.7.0.1
 Synopsis:            WAI middleware that serves requests to static files.
 Homepage:            https://github.com/scotty-web/wai-middleware-static
 Bug-reports:         https://github.com/scotty-web/wai-middleware-static/issues
@@ -24,21 +24,20 @@
   Exposed-modules:     Network.Wai.Middleware.Static
   default-language:    Haskell2010
   Build-depends:
-                       base             >= 4.6.0.1  && < 5,
-                       base16-bytestring >= 0.1 && < 0.2,
-                       bytestring       >= 0.10.0.2 && < 0.11,
-                       containers       >= 0.5.0.0  && < 0.6,
-                       cryptohash       >= 0.11     && < 0.12,
-                       directory        >= 1.2.0.1  && < 1.3,
-                       expiring-cache-map >= 0.0.5  && < 0.1,
-                       filepath         >= 1.3.0.1  && < 1.5,
-                       http-types       >= 0.8.2    && < 0.9,
-                       mtl              >= 2.1.2    && < 2.3,
-                       old-locale       >= 1.0      && < 1.1,
-                       text             >= 0.11.3.1 && < 1.3,
-                       time             >= 1.4      && < 1.6,
-                       unix             >= 2.7      && < 2.8,
-                       wai              >= 3.0.0    && < 3.1
+                       base               >= 4.6.0.1  && < 5,
+                       base16-bytestring  >= 0.1      && < 0.2,
+                       bytestring         >= 0.10.0.2 && < 0.11,
+                       containers         >= 0.5.0.0  && < 0.6,
+                       cryptohash         >= 0.11     && < 0.12,
+                       directory          >= 1.2.0.1  && < 1.3,
+                       expiring-cache-map >= 0.0.5    && < 0.1,
+                       filepath           >= 1.3.0.1  && < 1.5,
+                       http-types         >= 0.8.2    && < 0.9,
+                       mtl                >= 2.1.2    && < 2.3,
+                       old-locale         >= 1.0      && < 1.1,
+                       text               >= 0.11.3.1 && < 1.3,
+                       time               >= 1.4      && < 1.6,
+                       wai                >= 3.0.0    && < 3.1
 
   GHC-options: -Wall -fno-warn-orphans