diff --git a/Documentation/Haddocset.hs b/Documentation/Haddocset.hs
--- a/Documentation/Haddocset.hs
+++ b/Documentation/Haddocset.hs
@@ -139,11 +139,17 @@
                 | otherwise -> Just $
                     DocInfo
                         (sourcePackageId a)
-                        (haddockInterfaces a)
-                        (haddockHTMLs a)
+                        (map expandPkgRoot (haddockInterfaces a))
+                        (map expandPkgRoot (haddockHTMLs a))
                         (exposed a)
 
             ParseOk _  _  -> Nothing
+  where
+    -- drop the package.conf directory: pkgroot/package.conf.d/foo.conf -> pkgroot
+    pkgroot = takeDirectory . takeDirectory $ pifile
+    expandPkgRoot path = case splitPath path of
+        "${pkgroot}/":rest -> joinPath (pkgroot : rest)
+        _ -> path
 
 copyHtml :: DocFile -> FilePath -> IO ()
 copyHtml doc dst = do
@@ -245,7 +251,7 @@
         =$= awaitForever
             (\f -> yield
                 $ DocFile sourcePackageId dir
-                $ fromMaybe (error $ "Prefix missmatch: " ++ show (dir, f))
+                $ fromMaybe (error $ "Prefix mismatch: " ++ show (dir, f))
                 $ stripPrefixPath (addTrailingPathSeparator dir) f)
 
 data Provider
diff --git a/Main.hs b/Main.hs
--- a/Main.hs
+++ b/Main.hs
@@ -111,7 +111,7 @@
         <*> fmap docsetDir
             (strOption (long "target" <> short 't' <> metavar "DOCSET" <> help "output directory (default: haskell.docset)") <|> pure "haskell")
         <*> switch (long "quiet" <> short 'q' <> help "suppress output.")
-        <*> subparser (command "create" (info createOpts  $ progDesc "crate new docset.")
+        <*> subparser (command "create" (info createOpts  $ progDesc "create new docset.")
                     <> command "list"   (info (pure List) $ progDesc "list package of docset.")
                     <> command "add"    (info addOpts $ progDesc "add package to docset."))
 
diff --git a/haddocset.cabal b/haddocset.cabal
--- a/haddocset.cabal
+++ b/haddocset.cabal
@@ -1,5 +1,5 @@
 name:                haddocset
-version:             0.4.0
+version:             0.4.1
 synopsis:            Generate docset of Dash by Haddock haskell documentation tool
 description:         please read README.md <https://github.com/philopon/haddocset/blob/master/README.md>
 license:             BSD3