diff --git a/hpack-dhall.cabal b/hpack-dhall.cabal
--- a/hpack-dhall.cabal
+++ b/hpack-dhall.cabal
@@ -1,17 +1,17 @@
--- This file has been generated from package.yaml by hpack version 0.23.0.
+-- This file has been generated from package.yaml by hpack version 0.28.2.
 --
 -- see: https://github.com/sol/hpack
 --
--- hash: c298d477b6c09e70c97fdc47ae58b23f965424ab7ecd301c4ab4372a2851cbe7
+-- hash: 38e9ec5002ffc1e15956dcc564f84f57658610a5204fec5ff56d76d098689a1f
 
 name:           hpack-dhall
-version:        0.1.0
+version:        0.2.0
 synopsis:       Dhall support for Hpack
-description:    This package allows you to use the Dhall configuration language to specify
-                Haskell packages.
+description:    This package allows you to use the Dhall configuration language to specify Haskell packages.
 category:       Development
 homepage:       https://github.com/sol/hpack-dhall#readme
 bug-reports:    https://github.com/sol/hpack-dhall/issues
+maintainer:     Simon Hengel <sol@typeful.net>
 license:        PublicDomain
 build-type:     Simple
 cabal-version:  >= 1.10
@@ -34,10 +34,10 @@
     , base ==4.*
     , dhall
     , dhall-json
-    , hpack >=0.23.0
+    , hpack >=0.26.0
+    , megaparsec
     , text
     , transformers
-    , trifecta
   default-language: Haskell2010
 
 test-suite spec
@@ -56,11 +56,11 @@
     , base ==4.*
     , dhall
     , dhall-json
-    , hpack >=0.23.0
+    , hpack >=0.26.0
     , hspec ==2.*
     , interpolate
+    , megaparsec
     , mockery
     , text
     , transformers
-    , trifecta
   default-language: Haskell2010
diff --git a/src/Hpack/Dhall.hs b/src/Hpack/Dhall.hs
--- a/src/Hpack/Dhall.hs
+++ b/src/Hpack/Dhall.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE LambdaCase #-}
 {-# LANGUAGE NoMonomorphismRestriction #-}
 module Hpack.Dhall where
 
@@ -6,9 +7,7 @@
 import           Data.Bifunctor
 import           Data.Aeson
 import qualified Data.Text.Lazy.IO as LT
-import qualified Data.Text as T
-import           Data.Text.Encoding (encodeUtf8)
-import           Text.Trifecta.Delta (Delta(..))
+import           System.Environment
 import qualified Dhall.Parser
 import qualified Dhall.Import
 import qualified Dhall.TypeCheck
@@ -19,15 +18,18 @@
 packageConfig :: FilePath
 packageConfig = "package.dhall"
 
-readDhall :: FilePath -> IO (Either String Value)
-readDhall file = runExceptT $ do
+decodeDhall :: FilePath -> IO (Either String Value)
+decodeDhall file = runExceptT $ do
   expr <- readInput >>= parseExpr >>= liftIO . Dhall.Import.load
   _ <- liftResult $ Dhall.TypeCheck.typeOf expr
   liftResult $ Dhall.JSON.dhallToJSON expr
   where
     readInput = liftIO (LT.readFile file)
-    parseExpr = liftResult . Dhall.Parser.exprFromText (Directed (encodeUtf8 $ T.pack file) 0 0 0 0)
+    parseExpr = liftResult . Dhall.Parser.exprFromText file
     liftResult = ExceptT . return . first show
 
 main :: IO ()
-main = Hpack.mainWith packageConfig readDhall
+main = do
+  getArgs >>= Hpack.getOptions packageConfig >>= \ case
+    Just (verbose, options) -> Hpack.hpack verbose (Hpack.setDecode decodeDhall options)
+    Nothing -> return ()