diff --git a/brittany.cabal b/brittany.cabal
index ad87944..89f37c7 100644
--- a/brittany.cabal
+++ b/brittany.cabal
@@ -40,7 +40,7 @@ common library
   build-depends:
     , aeson ^>= 2.0.1
     , base ^>= 4.15.0
-    , butcher ^>= 1.3.3
+    , butcher ^>= 2.0.0
     , bytestring ^>= 0.10.12
     , cmdargs ^>= 0.10.21
     , containers ^>= 0.6.4
diff --git a/source/library/Language/Haskell/Brittany/Internal.hs b/source/library/Language/Haskell/Brittany/Internal.hs
index 06cbb63..fc2f099 100644
--- a/source/library/Language/Haskell/Brittany/Internal.hs
+++ b/source/library/Language/Haskell/Brittany/Internal.hs
@@ -114,8 +114,9 @@ extractCommentConfigs anns (TopLevelDeclNameMap declNameMap) = do
       , ( "yaml-config-document"
         , \s -> "{" `isPrefixOf` dropWhile (== ' ') s
         , Butcher.addCmdPart (Butcher.varPartDesc "yaml-config-document")
-        $ fmap (\lconf -> (mempty { _conf_layout = lconf }, ""))
-        . either (const Nothing) Just
+        $ either
+            (\_ -> Butcher.Failure Nothing)
+            (\lconf -> Butcher.Success (mempty { _conf_layout = lconf }) "")
         . Data.Yaml.decodeEither'
         . Data.ByteString.Char8.pack
           -- TODO: use some proper utf8 encoder instead?
@@ -173,7 +174,7 @@ extractCommentConfigs anns (TopLevelDeclNameMap declNameMap) = do
       conf <- configParser
       Butcher.addCmdImpl (InlineConfigTargetModule, conf)
   lineConfigss <- configLiness `forM` \(k, ss) -> do
-    r <- ss `forM` \s -> case Butcher.runCmdParserSimple s parser of
+    r <- ss `forM` \s -> case Butcher.runCmdParserSimpleString s parser of
       Left err -> Left $ (err, s)
       Right c -> Right $ c
     pure (k, r)
diff --git a/source/library/Language/Haskell/Brittany/Main.hs b/source/library/Language/Haskell/Brittany/Main.hs
index e599fc2..44eac1d 100644
--- a/source/library/Language/Haskell/Brittany/Main.hs
+++ b/source/library/Language/Haskell/Brittany/Main.hs
@@ -64,7 +64,7 @@ mainWith :: String -> [String] -> IO ()
 mainWith progName args =
   Environment.withProgName progName
     . Environment.withArgs args
-    $ mainFromCmdParserWithHelpDesc mainCmdParser
+    $ mainFromCmdParser mainCmdParser
 
 helpDoc :: PP.Doc
 helpDoc = PP.vcat $ List.intersperse
@@ -133,8 +133,9 @@ licenseDoc = PP.vcat $ List.intersperse
   ]
 
 
-mainCmdParser :: CommandDesc () -> CmdParser Identity (IO ()) ()
-mainCmdParser helpDesc = do
+mainCmdParser :: CmdParser Identity (IO ()) ()
+mainCmdParser = do
+  helpDesc <- peekCmdDesc
   addCmdSynopsis "haskell source pretty printer"
   addCmdHelp $ helpDoc
   -- addCmd "debugArgs" $ do