diff --git a/g-npm.cabal b/g-npm.cabal
--- a/g-npm.cabal
+++ b/g-npm.cabal
@@ -1,5 +1,5 @@
 Name:                g-npm
-Version:             0.0.2
+Version:             0.1.0
 Description:         Generate Gentoo ebuilds from NodeJS/npm packages.
 License:             MIT
 License-file:        LICENSE
diff --git a/src/Main.hs b/src/Main.hs
--- a/src/Main.hs
+++ b/src/Main.hs
@@ -5,7 +5,12 @@
 import Control.Monad
 import System.Environment
 import System.Console.GetOpt
+import System.Directory
 
+
+-- Default category
+nodeCat :: String
+nodeCat = "dev-nodejs"
 -- Flag type for Options
 data Flag = NoDeps 
         | PkgName String
@@ -22,7 +27,7 @@
 
 -- Default options
 startOptions = Options { optNoDeps = False
-                , optOverlay = "" 
+                , optOverlay = "/tmp/node-overlay" 
                 , optPkgName = ""
                 , optPkgVersion = "" }
                 
@@ -43,6 +48,20 @@
         (_,_,errs) -> ioError (userError (concat errs ++ usageInfo header options))
             where header = "Usage: g-npm [OPTION...]"
 
+-- checkOverlay
+-- Verifies if the Overlay path exists. Else, it creates it and 
+-- creates subfolders for dev-nodejs category.
+checkOverlay :: FilePath -> IO ()
+checkOverlay o = 
+        createDirectoryIfMissing True o
+
+buildEbuildPath :: String -> String -> String -> FilePath
+buildEbuildPath o n v =
+    (o ++ "/" ++ nodeCat ++ "/" ++ n ++ "/" ++ (buildPkgName n v))
+
+buildPkgName :: String -> String -> String
+buildPkgName n v = n ++ "-" ++ v ++ ".ebuild"
+
 -- Main
 main :: IO ()
 main = do
@@ -50,10 +69,14 @@
     (opts, non_opts) <- parseArgs args
     opts' <- foldl (>>=) (return startOptions) opts
 
-    pkg <- doGetNpm (optPkgName opts') (optPkgVersion opts')
+    let n = (optPkgName opts')
+    let v = (optPkgVersion opts')
+    let o = (optOverlay opts')
 
+    pkg <- doGetNpm n v
+    checkOverlay (o ++ "/" ++ nodeCat ++ "/" ++ n)
+
     case pkg of
-        Nothing -> ioError (userError ("Package " ++ (optPkgName opts') ++ 
+        Nothing -> ioError (userError ("Package " ++ n ++ 
             " not found."))
-        Just pkg -> putStrLn $ (showNpmEbuild pkg)
-
+        Just pkg -> writeFile (buildEbuildPath o n v) (showNpmEbuild pkg)
diff --git a/src/Npm.hs b/src/Npm.hs
--- a/src/Npm.hs
+++ b/src/Npm.hs
@@ -86,7 +86,12 @@
 depStrings :: Npm -> String
 depStrings pkg = concat $ 
                     intersperse "\n\t" $ 
-                        map (\(x, y) -> ">=dev-nodejs/" ++ x ++ "-" ++ (tail y)) $ dependencies pkg
+                        map (\(x, y) -> ">=dev-nodejs/" ++ x ++ "-" ++ (cleanVersion y)) $ dependencies pkg
+                where
+                    cleanVersion :: String -> String
+                    cleanVersion n 
+                            | head n == '~' = tail n
+                            | otherwise = n
 
 --
 -- Converts the resulting JSON from querying the NPM Registry,