diff --git a/CabalMeta.hs b/CabalMeta.hs
--- a/CabalMeta.hs
+++ b/CabalMeta.hs
@@ -1,11 +1,11 @@
 {-# LANGUAGE CPP, OverloadedStrings #-}
 module CabalMeta where
 
-import Shelly
+import Shelly hiding (tag)
 import Prelude hiding (FilePath)
 import Data.Text.Lazy (Text, unpack)
 import qualified Data.Text.Lazy as T
-import Filesystem.Path.CurrentOS (FilePath, hasExtension, filename)
+import Filesystem.Path.CurrentOS (hasExtension, filename)
 import Data.Maybe (fromMaybe, maybeToList)
 import Data.List (partition)
 
@@ -78,7 +78,7 @@
 
 readPackages :: Bool ->  FilePath -> ShIO PackageSources
 readPackages allowCabals startDir = do
-  fullDir <- path startDir
+  fullDir <- absPath startDir
   chdir fullDir $ do
     cabalPresent <- if allowCabals then return False else isCabalPresent
     if cabalPresent then return mempty else do
@@ -102,7 +102,7 @@
               readPackages False d
 
         child_dir_pkgs <- forM (dirs psources) $ \dir -> do
-          b <- fmap (== fullDir) (path $ dLocation dir)
+          b <- fmap (== fullDir) (absPath $ dLocation dir)
           if b then return mempty else readPackages False (dLocation dir)
 
         let child_pkgs = child_dir_pkgs ++ child_vendor_pkgs
@@ -136,7 +136,7 @@
         return $ sources { dirs = ds }
       where
         fullPath package = do
-          fp <- path $ dLocation package
+          fp <- absPath $ dLocation package
           return package { dLocation = fp }
 
         paritionSources :: [[Text]] -> PackageSources
diff --git a/cabal-meta.cabal b/cabal-meta.cabal
--- a/cabal-meta.cabal
+++ b/cabal-meta.cabal
@@ -1,5 +1,5 @@
 name:            cabal-meta
-version:         0.2.1
+version:         0.2.2
 license:         BSD3
 license-file:    LICENSE
 author:          Greg Weber <greg@gregweber.info>
@@ -21,9 +21,9 @@
         cpp-options:     -DGHC7
     else
         build-depends:   base            >= 4        && < 4.3
-    build-depends: shelly >= 0.6
+    build-depends: shelly >= 0.9
                  , text, system-filepath
-                  -- , file-location
+                 -- , file-location
     extensions: OverloadedStrings 
     exposed-modules: CabalMeta
 
@@ -35,7 +35,7 @@
         cpp-options:     -DGHC7
     else
         build-depends:   base            >= 4        && < 4.3
-    build-depends: shelly >= 0.3.1
+    build-depends: shelly >= 0.9
                  , text, system-filepath
                  -- , file-location
 
@@ -48,7 +48,7 @@
   hs-source-dirs: .
   type:           exitcode-stdio-1.0
 
-  build-depends: shelly >= 0.3.1
+  build-depends: shelly >= 0.9
                , hspec, HUnit, unix, base, text, system-filepath
                  -- , file-location
   extensions: OverloadedStrings 
diff --git a/main.hs b/main.hs
--- a/main.hs
+++ b/main.hs
@@ -4,12 +4,11 @@
 import System.Environment (getArgs)
 
 import qualified Data.Text.Lazy as T
-import Control.Monad (forM_, when, unless)
--- import Filesystem.Path.CurrentOS (decodeString)
+import Control.Monad (forM_)
 import Data.Maybe (isNothing)
 import Data.Text.Lazy (Text, pack)
 
-import Filesystem.Path.CurrentOS (FilePath, filename)
+import Filesystem.Path.CurrentOS (filename)
 import Prelude hiding (FilePath)
 
 headDef :: a -> [a] -> a
@@ -35,6 +34,14 @@
 progName Cabal = "cabal"
 progName CabalDev = "cabal-dev"
 
+assertCabalDevInstalled :: CabalExe -> ShIO ()
+assertCabalDevInstalled Cabal    = return ()
+assertCabalDevInstalled CabalDev = do
+  mcd <- which "cabal-dev"
+  case mcd of
+    Just _ -> return ()
+    Nothing -> error "--dev requires cabal-dev to be installed"
+
 main :: IO ()
 main = do
   cmdArgs <- fmap (map pack) getArgs
@@ -43,6 +50,7 @@
         noDevArgs = filter (/= "--dev") cmdArgs
         cabal = if isDev then CabalDev else Cabal
 
+    assertCabalDevInstalled cabal
     unless (headDef "" noDevArgs == "install") $
       errorExit help
 
diff --git a/test/main.hs b/test/main.hs
--- a/test/main.hs
+++ b/test/main.hs
@@ -9,7 +9,7 @@
 import Filesystem.Path.CurrentOS hiding (fromText, (</>))
 
 main :: IO ()
-main = hspecX $
+main = hspec $
   it "gets the packages" $ do
     (psources, wd) <- shelly $ verbosely $ do
       ps <- readPackages True "test"