diff --git a/README.md b/README.md
--- a/README.md
+++ b/README.md
@@ -112,6 +112,16 @@
 
 Just copy the code above to your ~/.vimrc and reload the vim.
 
+
+NIXOS Note
+----------
+
+The easiest way to generate tags file on NixOS is to open a shell containing
+neccesary programs. Nix-shell should do it if run as follows:
+
+    nix-shell -p haskellPackages.haskdogs  haskellPackages.hasktags haskellPackages.Cabal ghc
+
+
 --
 Sergey
 <grrwlf@gmail.com>
diff --git a/haskdogs.cabal b/haskdogs.cabal
--- a/haskdogs.cabal
+++ b/haskdogs.cabal
@@ -1,5 +1,5 @@
 Name:                haskdogs
-Version:             0.5.1
+Version:             0.5.3
 Synopsis:            Generate tags file for Haskell project and its nearest deps
 Homepage:            http://github.com/grwlf/haskdogs
 License:             BSD3
diff --git a/src/Main.hs b/src/Main.hs
--- a/src/Main.hs
+++ b/src/Main.hs
@@ -35,6 +35,7 @@
   , cli_stack_args :: String
   , cli_ghc_pkgs_args :: String
   , cli_use_stack :: Tristate
+  , cli_deps_dir :: FilePath
   -- , cli_use_sandbox :: Tristate
   , cli_hasktags_args2 :: [String]
   } deriving(Show)
@@ -44,20 +45,20 @@
 
 def_hasktags_args = words "-c -x"
 
-optsParser :: Parser Opts
-optsParser = Opts
+optsParser :: FilePath -> Parser Opts
+optsParser def_deps_dir = Opts
   <$> strOption (
         long "dir-list" <>
         short 'd' <>
         metavar "FILE" <>
         value "" <>
-        help "File containing directory list to process" )
+        help "File containing directory list to process (use '-' to read from stdin)" )
   <*> strOption (
         long "file-list" <>
         short 'f' <>
         metavar "FILE" <>
         value "" <>
-        help "File containing Haskell sources to process" )
+        help "File containing Haskell sources to process (use '-' to read from stdin)" )
   <*> strOption (
         long "hasktags-args" <>
         metavar "OPTS" <>
@@ -77,6 +78,11 @@
         long "use-stack" <>
         value AUTO <>
         help "Execute ghc-pkg via stack, arg is ON, OFF or AUTO (the default)")
+  <*> strOption (
+        long "deps-dir" <>
+        metavar "PATH" <>
+        value def_deps_dir <>
+        help ("Specify the directory PATH to save the dependencies of the project. Default is [" <> def_deps_dir <> "]"))
   -- <*> option auto (
   --       long "include-sandbox" <>
   --       value AUTO <>
@@ -90,7 +96,7 @@
 versionParser = infoOption (exename ++ " version " ++ (showVersion Paths.version))
                      (long "version" <> help "Show version number")
 
-opts = info (helper <*> versionParser <*> optsParser)
+opts def_deps_dir = info (helper <*> versionParser <*> (optsParser def_deps_dir))
       ( fullDesc <> header (exename ++ " - Recursive hasktags-based TAGS generator for a Haskell project" ))
 
 {-
@@ -105,15 +111,16 @@
 main :: IO()
 main = do
 
-  Opts {..} <- execParser opts
+  def_deps_dir <- (</> ".haskdogs") <$> getHomeDirectory
 
+  Opts {..} <- execParser (opts def_deps_dir)
+
   let
     -- Directory to unpack sources into
     getDataDir :: IO FilePath
     getDataDir = do
-      x <- (</> ".haskdogs") <$> getHomeDirectory
-      createDirectoryIfMissing False x
-      return x
+      createDirectoryIfMissing False cli_deps_dir
+      return cli_deps_dir
 
     cli_verbose = True
 
@@ -231,7 +238,9 @@
           fail $ "Haskdogs were not able to find any sources in " <> (intercalate ", " dirs)
         ss_l1deps <- findModules ss_local >>= inames2modules >>= unpackModules >>= findSources
         return $ ss_local `mappend` ss_l1deps
-      runp "hasktags" ((if null cli_hasktags_args then def_hasktags_args else cli_hasktags_args) ++ Set.toList files) []
+      sfiles <- pure $ unlines $ Set.toList files
+      vprint sfiles
+      runp "hasktags" ((if null cli_hasktags_args then def_hasktags_args else cli_hasktags_args) ++ ["STDIN"]) sfiles
       putStrLn "\nSuccess"
 
   {- _real_main_ -}