diff --git a/Main.hs b/Main.hs
--- a/Main.hs
+++ b/Main.hs
@@ -140,6 +140,7 @@
     , directory :: FilePath
     , file :: FilePath
     , source :: Bool
+    , document :: Bool
     }
 
 data Directory = Directory
@@ -147,6 +148,7 @@
     , directory :: FilePath
     , file :: FilePath
     , source :: Bool
+    , document :: Bool
     }
 
 data NixPrefetchGit = NixPrefetchGit
@@ -197,6 +199,13 @@
         <>  Options.help "Configure the Nix package to include source code"
         )
 
+parseDocument :: Parser Bool
+parseDocument =
+    Options.switch
+        (   Options.long "document"
+        <>  Options.help "Generate documentation for the Nix package"
+        )
+
 parseName :: Parser (Maybe Text)
 parseName =
     optional
@@ -246,6 +255,8 @@
 
     source <- parseSource
 
+    document <- parseDocument
+
     return GitHub{..}
 
 parseDirectory :: Parser Directory
@@ -258,6 +269,8 @@
 
     source <- parseSource
 
+    document <- parseDocument
+
     return Directory{..}
 
 parserInfoOptions :: ParserInfo Options
@@ -399,7 +412,7 @@
                     let functionParameter = (prelude, Nothing)
 
                     let dependencyExpression =
-                                (Nix.mkSym prelude @. "override")
+                                (Nix.mkSym prelude @. "overridePackage")
                             @@  Nix.attrsE
                                     [ ("file", Nix.mkStr fileArgument ) ]
 
@@ -411,7 +424,7 @@
                     let functionParameter = (repo, Nothing)
 
                     let dependencyExpression =
-                                (Nix.mkSym repo @. "override")
+                                (Nix.mkSym repo @. "overridePackage")
                             @@  Nix.attrsE
                                     [ ("file", Nix.mkStr fileArgument ) ]
 
@@ -453,7 +466,7 @@
             let functionParameter = (prelude, Nothing)
 
             let dependencyExpression =
-                        (Nix.mkSym prelude @. "override")
+                        (Nix.mkSym prelude @. "overridePackage")
                     @@  Nix.attrsE
 
                             [ ("file", Nix.mkStr fileArgument) ]
@@ -463,7 +476,7 @@
             die (UnsupportedDomainDependency url authority)
 
 githubToNixpkgs :: GitHub -> IO ()
-githubToNixpkgs GitHub{ name, uri, rev = maybeRev, hash, fetchSubmodules, directory, file, source } = do
+githubToNixpkgs GitHub{ name, uri, rev = maybeRev, hash, fetchSubmodules, directory, file, source, document } = do
     URI{ uriScheme, uriAuthority = Just URIAuth{ uriUserInfo, uriRegName, uriPort }, uriPath, uriQuery, uriFragment } <- do
         case URI.parseAbsoluteURI (Text.unpack uri) of
             Nothing -> die (RepositoryIsNotAValidURI uri)
@@ -569,8 +582,6 @@
 
     let baseDirectory = Turtle.directory expressionFile
 
-    let baseDirectoryString = Turtle.encodeString baseDirectory
-
     exists <- Turtle.testfile expressionFile
 
     if exists
@@ -579,9 +590,13 @@
 
     expressionText <- Turtle.readTextFile expressionFile
 
-    expression <- Dhall.Core.throws (Dhall.Parser.exprFromText baseDirectoryString expressionText)
+    let expressionFileString = Turtle.encodeString expressionFile
 
+    expression <- Dhall.Core.throws (Dhall.Parser.exprFromText expressionFileString expressionText)
+
     let status = Dhall.Import.emptyStatus baseDirectoryString
+          where
+            baseDirectoryString = Turtle.encodeString baseDirectory
 
     dependencies <- Turtle.reduce Foldl.nub (State.evalStateT (findExternalDependencies expression) status)
 
@@ -610,6 +625,7 @@
                         , ("directory", Nix.mkStr (Turtle.format fp directory))
                         , ("file", Nix.mkStr (Turtle.format fp file))
                         , ("source", Nix.mkBool source)
+                        , ("document", Nix.mkBool document)
                         , ("dependencies", Nix.mkList (nub (fmap dependencyExpression nixDependencies)))
                         ]
                 )
@@ -617,7 +633,7 @@
     Prettyprint.Text.putDoc ((Nix.Pretty.prettyNix nixExpression) <> "\n")
 
 directoryToNixpkgs :: Directory -> IO ()
-directoryToNixpkgs Directory{ name, directory, file, source } = do
+directoryToNixpkgs Directory{ name, directory, file, source, document } = do
     let finalName =
             case name of
                 Nothing -> Turtle.format fp (Turtle.dirname directory)
@@ -634,11 +650,14 @@
 
     expressionText <- Turtle.readTextFile expressionFile
 
-    let directoryString = Turtle.encodeString directory
+    let expressionFileString = Turtle.encodeString expressionFile
 
-    expression <- Dhall.Core.throws (Dhall.Parser.exprFromText directoryString expressionText)
+    expression <- Dhall.Core.throws (Dhall.Parser.exprFromText expressionFileString expressionText)
 
     let status = Dhall.Import.emptyStatus directoryString
+          where
+            directoryString =
+                Turtle.encodeString (Turtle.directory expressionFile)
 
     dependencies <- Turtle.reduce Foldl.nub (State.evalStateT (findExternalDependencies expression) status)
 
@@ -649,6 +668,8 @@
     let src | null directoryString        = directoryString
             | last directoryString == '/' = init directoryString
             | otherwise                   = directoryString
+          where
+            directoryString = Turtle.encodeString directory
 
     let nixExpression =
             Nix.mkFunction
@@ -664,6 +685,7 @@
                         , ("src", Nix.mkPath False src)
                         , ("file", Nix.mkStr (Turtle.format fp file))
                         , ("source", Nix.mkBool source)
+                        , ("document", Nix.mkBool document)
                         , ("dependencies", Nix.mkList (nub (fmap dependencyExpression nixDependencies)))
                         ]
                 )
diff --git a/dhall-nixpkgs.cabal b/dhall-nixpkgs.cabal
--- a/dhall-nixpkgs.cabal
+++ b/dhall-nixpkgs.cabal
@@ -1,4 +1,4 @@
-Version:             1.0.2
+Version:             1.0.3
 Cabal-Version:       >=1.10
 Name:                dhall-nixpkgs
 Synopsis:            Convert Dhall projects to Nix packages
@@ -19,9 +19,9 @@
   Build-Depends:       base                 >= 4.11     && < 5
                      , aeson                >= 1.0.0.0  && < 1.5
                      , data-fix
-                     , dhall                >= 1.32.0   && < 1.37
+                     , dhall                >= 1.32.0   && < 1.38
                      , foldl                               < 1.5
-                     , hnix                 >= 0.10.1   && < 0.11
+                     , hnix                 >= 0.10.1   && < 0.12
                      , lens-family-core     >= 1.0.0    && < 2.2
                      , megaparsec           >= 7.0.0    && < 9.1
                      , mmorph                              < 1.2