diff --git a/Documentation/Haddocset.hs b/Documentation/Haddocset.hs
--- a/Documentation/Haddocset.hs
+++ b/Documentation/Haddocset.hs
@@ -46,13 +46,22 @@
     then d
     else d P.<.> "docset"
 
-globalPackageDirectory :: FilePath -> IO P.FilePath
-globalPackageDirectory hcPkg =
-    P.decodeString . init . head . lines <$> readProcess hcPkg ["list"] ""
+globalPackageDirectories :: FilePath -> IO [P.FilePath]
+globalPackageDirectories hcPkg = do
+    ds <- map (P.decodeString . init) . filter isPkgDBLine . lines <$>
+        readProcess hcPkg ["list", "--global"] ""
+    forM ds $ \d -> P.isDirectory d >>= \isDir ->
+        if isDir
+        then return d
+        else return (P.directory d)
+  where
+    isPkgDBLine ""      = False
+    isPkgDBLine (' ':_) = False
+    isPkgDBLine _       = True
 
 packageConfs :: P.FilePath -> IO [P.FilePath]
 packageConfs dir =
-    filter ((== Just "conf") . P.extension) <$> P.listDirectory dir
+    filter (("package.cache" /=) . P.filename) <$> P.listDirectory dir
 
 data DocInfo = DocInfo
     { diPackageId  :: PackageId
diff --git a/Main.hs b/Main.hs
--- a/Main.hs
+++ b/Main.hs
@@ -35,9 +35,14 @@
     Sql.execute_ conn "CREATE TABLE searchIndex(id INTEGER PRIMARY KEY, name TEXT, type TEXT, path TEXT, package TEXT);"
     Sql.execute_ conn "CREATE UNIQUE INDEX anchor ON searchIndex (name, type, path, package);"
 
-    globalDir <- globalPackageDirectory (optHcPkg o)
-    unless (optQuiet o) $ putStr "    Global package directory: " >> putStrLn (P.encodeString globalDir)
-    globals <- map (globalDir P.</>) <$> packageConfs globalDir
+    globalDirs <- globalPackageDirectories (optHcPkg o)
+    unless (optQuiet o) $ do
+        putStr "    Global package directory: "
+        putStr (P.encodeString $ head globalDirs)
+        if length globalDirs > 1
+            then putStr " and " >> putStr (show . pred $ length globalDirs) >> putStrLn "directories."
+            else putStrLn ""
+    globals <- concat <$> mapM (\d -> map (d P.</>) <$> packageConfs d) globalDirs
     let locals = toAddFiles $ optCommand o
     iFiles <- filter diExposed . catMaybes <$> mapM readDocInfoFile (globals ++ locals)
     unless (optQuiet o) $ putStr "    Global package count:     " >> print (length globals)
diff --git a/haddocset.cabal b/haddocset.cabal
--- a/haddocset.cabal
+++ b/haddocset.cabal
@@ -1,5 +1,5 @@
 name:                haddocset
-version:             0.3.0
+version:             0.3.1
 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