Use implicit Prelude (#6187)

* Use implicit Prelude

The previous behavior was introduced as a fix for #4464. It seems that
this change alone did not fix the issue, and `stack ghci` and `cabal
repl` only work with GHC 8.4.1 or newer, as no custom Prelude is loaded
for these versions. Given this, it seems cleaner to revert to the
implicit Prelude.

* PandocMonad: remove outdated check for base version

Only base versions 4.9 and later are supported, the check for
`MIN_VERSION_base(4,8,0)` is therefore unnecessary.

* Always use custom prelude

Previously, the custom prelude was used only with older GHC versions, as
a workaround for problems with ghci. The ghci problems are resolved by
replacing package `base` with `base-noprelude`, allowing for consistent
use of the custom prelude across all GHC versions.

58 files changed, 0 insertions, 113 deletions

diff --git a/src/Text/Pandoc/Readers/CSV.hs b/src/Text/Pandoc/Readers/CSV.hs
index cc64567e9..fa358424f 100644
--- a/src/Text/Pandoc/Readers/CSV.hs
+++ b/src/Text/Pandoc/Readers/CSV.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude   #-}
 {-# LANGUAGE FlexibleContexts    #-}
 
 {-# LANGUAGE ScopedTypeVariables #-}
@@ -14,7 +13,6 @@
 Conversion from CSV to a 'Pandoc' table.
 -}
 module Text.Pandoc.Readers.CSV ( readCSV ) where
-import Prelude
 import Data.Text (Text)
 import qualified Data.Text as T
 import Text.Pandoc.CSV (parseCSV, defaultCSVOptions)
diff --git a/src/Text/Pandoc/Readers/CommonMark.hs b/src/Text/Pandoc/Readers/CommonMark.hs
index a86cf692f..aec9ec9ea 100644
--- a/src/Text/Pandoc/Readers/CommonMark.hs
+++ b/src/Text/Pandoc/Readers/CommonMark.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE ViewPatterns      #-}
 {- |
@@ -17,7 +16,6 @@ CommonMark is a strongly specified variant of Markdown: http://commonmark.org.
 module Text.Pandoc.Readers.CommonMark (readCommonMark)
 where
 
-import Prelude
 import CMarkGFM
 import Control.Monad.State
 import qualified Data.Set as Set
diff --git a/src/Text/Pandoc/Readers/Creole.hs b/src/Text/Pandoc/Readers/Creole.hs
index 1aa1dfaa4..38e4ea81a 100644
--- a/src/Text/Pandoc/Readers/Creole.hs
+++ b/src/Text/Pandoc/Readers/Creole.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE OverloadedStrings #-}
 {- |
    Module      : Text.Pandoc.Readers.Creole
@@ -14,7 +13,6 @@ Conversion of creole text to 'Pandoc' document.
 module Text.Pandoc.Readers.Creole ( readCreole
                                   ) where
 
-import Prelude
 import Control.Monad.Except (guard, liftM2, throwError)
 import qualified Data.Foldable as F
 import Data.Maybe (fromMaybe)
diff --git a/src/Text/Pandoc/Readers/DocBook.hs b/src/Text/Pandoc/Readers/DocBook.hs
index 49fd86703..abaa9c7ed 100644
--- a/src/Text/Pandoc/Readers/DocBook.hs
+++ b/src/Text/Pandoc/Readers/DocBook.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE OverloadedStrings #-}
 {- |
    Module      : Text.Pandoc.Readers.DocBook
@@ -12,7 +11,6 @@
 Conversion of DocBook XML to 'Pandoc' document.
 -}
 module Text.Pandoc.Readers.DocBook ( readDocBook ) where
-import Prelude
 import Control.Monad.State.Strict
 import Data.Char (isSpace, toUpper)
 import Data.Default
diff --git a/src/Text/Pandoc/Readers/Docx.hs b/src/Text/Pandoc/Readers/Docx.hs
index 26cf6acdd..4a5447f1a 100644
--- a/src/Text/Pandoc/Readers/Docx.hs
+++ b/src/Text/Pandoc/Readers/Docx.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE CPP               #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE PatternGuards     #-}
@@ -60,7 +59,6 @@ module Text.Pandoc.Readers.Docx
        ( readDocx
        ) where
 
-import Prelude
 import Codec.Archive.Zip
 import Control.Monad.Reader
 import Control.Monad.State.Strict
diff --git a/src/Text/Pandoc/Readers/Docx/Combine.hs b/src/Text/Pandoc/Readers/Docx/Combine.hs
index c4c9332cd..54736cd0e 100644
--- a/src/Text/Pandoc/Readers/Docx/Combine.hs
+++ b/src/Text/Pandoc/Readers/Docx/Combine.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude    #-}
 {-# LANGUAGE FlexibleInstances    #-}
 {-# LANGUAGE PatternGuards        #-}
 {-# LANGUAGE OverloadedStrings    #-}
@@ -59,7 +58,6 @@ module Text.Pandoc.Readers.Docx.Combine ( smushInlines
                                         )
        where
 
-import Prelude
 import Data.List
 import Data.Sequence (ViewL (..), ViewR (..), viewl, viewr, (><), (|>))
 import qualified Data.Sequence as Seq (null)
diff --git a/src/Text/Pandoc/Readers/Docx/Fields.hs b/src/Text/Pandoc/Readers/Docx/Fields.hs
index ad17e9b54..442bc3466 100644
--- a/src/Text/Pandoc/Readers/Docx/Fields.hs
+++ b/src/Text/Pandoc/Readers/Docx/Fields.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE OverloadedStrings #-}
 {- |
    Module      : Text.Pandoc.Readers.Docx.Fields
@@ -16,7 +15,6 @@ module Text.Pandoc.Readers.Docx.Fields ( FieldInfo(..)
                                        , parseFieldInfo
                                        ) where
 
-import Prelude
 import Data.Functor (($>), void)
 import qualified Data.Text as T
 import Text.Parsec
diff --git a/src/Text/Pandoc/Readers/Docx/Lists.hs b/src/Text/Pandoc/Readers/Docx/Lists.hs
index c3e780bc6..e63f8457e 100644
--- a/src/Text/Pandoc/Readers/Docx/Lists.hs
+++ b/src/Text/Pandoc/Readers/Docx/Lists.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE OverloadedStrings #-}
 {- |
    Module      : Text.Pandoc.Readers.Docx.Lists
@@ -18,7 +17,6 @@ module Text.Pandoc.Readers.Docx.Lists ( blocksToBullets
                                       , listParagraphStyles
                                       ) where
 
-import Prelude
 import Data.List
 import Data.Maybe
 import Data.String (fromString)
diff --git a/src/Text/Pandoc/Readers/Docx/Parse.hs b/src/Text/Pandoc/Readers/Docx/Parse.hs
index 5f417dfeb..199ca6d03 100644
--- a/src/Text/Pandoc/Readers/Docx/Parse.hs
+++ b/src/Text/Pandoc/Readers/Docx/Parse.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE ViewPatterns      #-}
 {-# LANGUAGE OverloadedStrings #-}
 {- |
@@ -52,7 +51,6 @@ module Text.Pandoc.Readers.Docx.Parse ( Docx(..)
                                       , constructBogusParStyleData
                                       , leftBiasedMergeRunStyle
                                       ) where
-import Prelude
 import Text.Pandoc.Readers.Docx.Parse.Styles
 import Codec.Archive.Zip
 import Control.Applicative ((<|>))
diff --git a/src/Text/Pandoc/Readers/Docx/Parse/Styles.hs b/src/Text/Pandoc/Readers/Docx/Parse/Styles.hs
index bfe516f82..bfbc65cb0 100644
--- a/src/Text/Pandoc/Readers/Docx/Parse/Styles.hs
+++ b/src/Text/Pandoc/Readers/Docx/Parse/Styles.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE FlexibleInstances #-}
 {-# LANGUAGE FlexibleContexts  #-}
 {-# LANGUAGE TypeFamilies      #-}
@@ -43,7 +42,6 @@ module Text.Pandoc.Readers.Docx.Parse.Styles (
   , defaultRunStyle
   , checkOnOff
   ) where
-import Prelude
 import Codec.Archive.Zip
 import Control.Applicative ((<|>))
 import Control.Monad.Except
diff --git a/src/Text/Pandoc/Readers/Docx/Util.hs b/src/Text/Pandoc/Readers/Docx/Util.hs
index 3fe7e5edf..a573344ff 100644
--- a/src/Text/Pandoc/Readers/Docx/Util.hs
+++ b/src/Text/Pandoc/Readers/Docx/Util.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {- |
    Module      : Text.Pandoc.Readers.Docx.StyleMaps
    Copyright   : © 2014-2020 Jesse Rosenthal <jrosenthal@jhu.edu>,
@@ -24,7 +23,6 @@ module Text.Pandoc.Readers.Docx.Util (
                                       , findAttrTextByName
                                       ) where
 
-import Prelude
 import Data.Maybe (mapMaybe)
 import qualified Data.Text as T
 import Text.XML.Light
diff --git a/src/Text/Pandoc/Readers/DokuWiki.hs b/src/Text/Pandoc/Readers/DokuWiki.hs
index e3e4a0ed8..81c3a57d1 100644
--- a/src/Text/Pandoc/Readers/DokuWiki.hs
+++ b/src/Text/Pandoc/Readers/DokuWiki.hs
@@ -1,5 +1,4 @@
 {-# LANGUAGE FlexibleContexts  #-}
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE TupleSections     #-}
 {-# LANGUAGE ViewPatterns      #-}
@@ -16,7 +15,6 @@ Conversion of DokuWiki text to 'Pandoc' document.
 -}
 module Text.Pandoc.Readers.DokuWiki (readDokuWiki) where
 
-import Prelude
 import Control.Monad
 import Control.Monad.Except (throwError)
 import Data.Char (isAlphaNum, isDigit)
diff --git a/src/Text/Pandoc/Readers/EPUB.hs b/src/Text/Pandoc/Readers/EPUB.hs
index 820b6582f..afb9d7868 100644
--- a/src/Text/Pandoc/Readers/EPUB.hs
+++ b/src/Text/Pandoc/Readers/EPUB.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE TupleSections     #-}
 {-# LANGUAGE ViewPatterns      #-}
 {-# LANGUAGE OverloadedStrings #-}
@@ -18,7 +17,6 @@ module Text.Pandoc.Readers.EPUB
   (readEPUB)
   where
 
-import Prelude
 import Codec.Archive.Zip (Archive (..), Entry, findEntryByPath, fromEntry,
                           toArchiveOrFail)
 import Control.DeepSeq (NFData, deepseq)
diff --git a/src/Text/Pandoc/Readers/FB2.hs b/src/Text/Pandoc/Readers/FB2.hs
index 5e88bc157..61eda0077 100644
--- a/src/Text/Pandoc/Readers/FB2.hs
+++ b/src/Text/Pandoc/Readers/FB2.hs
@@ -23,7 +23,6 @@ TODO:
 -}
 
 module Text.Pandoc.Readers.FB2 ( readFB2 ) where
-import Prelude
 import Control.Monad.Except (throwError)
 import Control.Monad.State.Strict
 import Data.ByteString.Lazy.Char8 ( pack )
diff --git a/src/Text/Pandoc/Readers/HTML.hs b/src/Text/Pandoc/Readers/HTML.hs
index 9f98d7139..95e880ef5 100644
--- a/src/Text/Pandoc/Readers/HTML.hs
+++ b/src/Text/Pandoc/Readers/HTML.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude     #-}
 {-# LANGUAGE LambdaCase            #-}
 {-# LANGUAGE FlexibleContexts      #-}
 {-# LANGUAGE FlexibleInstances     #-}
@@ -26,7 +25,6 @@ module Text.Pandoc.Readers.HTML ( readHtml
                                 , isCommentTag
                                 ) where
 
-import Prelude
 import Control.Applicative ((<|>))
 import Control.Arrow (first)
 import Control.Monad (guard, mplus, msum, mzero, unless, void)
diff --git a/src/Text/Pandoc/Readers/Haddock.hs b/src/Text/Pandoc/Readers/Haddock.hs
index 3fc2f9715..44a3fe31f 100644
--- a/src/Text/Pandoc/Readers/Haddock.hs
+++ b/src/Text/Pandoc/Readers/Haddock.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE CPP               #-}
 {-# LANGUAGE OverloadedStrings #-}
 {- |
@@ -16,7 +15,6 @@ module Text.Pandoc.Readers.Haddock
     ( readHaddock
     ) where
 
-import Prelude
 import Control.Monad.Except (throwError)
 import Data.List (intersperse)
 import Data.Maybe (fromMaybe)
diff --git a/src/Text/Pandoc/Readers/Ipynb.hs b/src/Text/Pandoc/Readers/Ipynb.hs
index ec8633e44..b598e4ebe 100644
--- a/src/Text/Pandoc/Readers/Ipynb.hs
+++ b/src/Text/Pandoc/Readers/Ipynb.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE LambdaCase #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE FlexibleContexts  #-}
@@ -16,7 +15,6 @@ Ipynb (Jupyter notebook JSON format) reader for pandoc.
 -}
 module Text.Pandoc.Readers.Ipynb ( readIpynb )
 where
-import Prelude
 import Data.Char (isDigit)
 import Data.Maybe (fromMaybe)
 import Data.Digest.Pure.SHA (sha1, showDigest)
diff --git a/src/Text/Pandoc/Readers/JATS.hs b/src/Text/Pandoc/Readers/JATS.hs
index daa0eff57..e5c63936c 100644
--- a/src/Text/Pandoc/Readers/JATS.hs
+++ b/src/Text/Pandoc/Readers/JATS.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE TupleSections #-}
 {-# LANGUAGE OverloadedStrings #-}
 {- |
@@ -14,7 +13,6 @@ Conversion of JATS XML to 'Pandoc' document.
 -}
 
 module Text.Pandoc.Readers.JATS ( readJATS ) where
-import Prelude
 import Control.Monad.State.Strict
 import Data.Char (isDigit, isSpace, toUpper)
 import Data.Default
diff --git a/src/Text/Pandoc/Readers/Jira.hs b/src/Text/Pandoc/Readers/Jira.hs
index 42ccbc1f5..89acb1fbb 100644
--- a/src/Text/Pandoc/Readers/Jira.hs
+++ b/src/Text/Pandoc/Readers/Jira.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE LambdaCase #-}
 {-# LANGUAGE OverloadedStrings #-}
 {- |
@@ -12,7 +11,6 @@ Conversion of jira wiki formatted plain text to 'Pandoc' document.
 -}
 module Text.Pandoc.Readers.Jira ( readJira ) where
 
-import Prelude
 import Control.Monad.Except (throwError)
 import Data.Text (Text, append, pack, singleton, unpack)
 import Text.HTML.TagSoup.Entity (lookupEntity)
diff --git a/src/Text/Pandoc/Readers/LaTeX.hs b/src/Text/Pandoc/Readers/LaTeX.hs
index f9afc01ba..a1216ae88 100644
--- a/src/Text/Pandoc/Readers/LaTeX.hs
+++ b/src/Text/Pandoc/Readers/LaTeX.hs
@@ -1,5 +1,4 @@
 {-# LANGUAGE CPP                   #-}
-{-# LANGUAGE NoImplicitPrelude     #-}
 {-# LANGUAGE FlexibleInstances     #-}
 {-# LANGUAGE MultiParamTypeClasses #-}
 {-# LANGUAGE OverloadedStrings     #-}
@@ -27,7 +26,6 @@ module Text.Pandoc.Readers.LaTeX ( readLaTeX,
                                    untokenize
                                  ) where
 
-import Prelude
 import Control.Applicative (many, optional, (<|>))
 import Control.Monad
 import Control.Monad.Except (throwError)
diff --git a/src/Text/Pandoc/Readers/LaTeX/Lang.hs b/src/Text/Pandoc/Readers/LaTeX/Lang.hs
index 50fdc8fc6..55965c995 100644
--- a/src/Text/Pandoc/Readers/LaTeX/Lang.hs
+++ b/src/Text/Pandoc/Readers/LaTeX/Lang.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE OverloadedStrings #-}
 {- |
    Module      : Text.Pandoc.Readers.LaTeX.Lang
@@ -17,7 +16,6 @@ module Text.Pandoc.Readers.LaTeX.Lang
   , babelLangToBCP47
   )
 where
-import Prelude
 import qualified Data.Map as M
 import qualified Data.Text as T
 import Text.Pandoc.BCP47 (Lang(..))
diff --git a/src/Text/Pandoc/Readers/LaTeX/Parsing.hs b/src/Text/Pandoc/Readers/LaTeX/Parsing.hs
index 82dc4e03c..c83ba0002 100644
--- a/src/Text/Pandoc/Readers/LaTeX/Parsing.hs
+++ b/src/Text/Pandoc/Readers/LaTeX/Parsing.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE FlexibleInstances     #-}
 {-# LANGUAGE MultiParamTypeClasses #-}
 {-# LANGUAGE OverloadedStrings     #-}
@@ -69,7 +68,6 @@ module Text.Pandoc.Readers.LaTeX.Parsing
   , withRaw
   ) where
 
-import Prelude
 import Control.Applicative (many, (<|>))
 import Control.Monad
 import Control.Monad.Except (throwError)
diff --git a/src/Text/Pandoc/Readers/LaTeX/Types.hs b/src/Text/Pandoc/Readers/LaTeX/Types.hs
index ae400dfee..a017a2afb 100644
--- a/src/Text/Pandoc/Readers/LaTeX/Types.hs
+++ b/src/Text/Pandoc/Readers/LaTeX/Types.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {- |
    Module      : Text.Pandoc.Readers.LaTeX.Types
    Copyright   : Copyright (C) 2017-2020 John MacFarlane
@@ -18,7 +17,6 @@ module Text.Pandoc.Readers.LaTeX.Types ( Tok(..)
                                        , SourcePos
                                        )
 where
-import Prelude
 import Data.Text (Text)
 import Text.Parsec.Pos (SourcePos)
 
diff --git a/src/Text/Pandoc/Readers/Man.hs b/src/Text/Pandoc/Readers/Man.hs
index d3106575a..eec1d46d4 100644
--- a/src/Text/Pandoc/Readers/Man.hs
+++ b/src/Text/Pandoc/Readers/Man.hs
@@ -14,7 +14,6 @@ Conversion of man to 'Pandoc' document.
 -}
 module Text.Pandoc.Readers.Man (readMan) where
 
-import Prelude
 import Data.Char (toLower)
 import Data.Default (Default)
 import Control.Monad (liftM, mzero, guard, void)
diff --git a/src/Text/Pandoc/Readers/Markdown.hs b/src/Text/Pandoc/Readers/Markdown.hs
index 0a9897eb6..3e61c2e81 100644
--- a/src/Text/Pandoc/Readers/Markdown.hs
+++ b/src/Text/Pandoc/Readers/Markdown.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude   #-}
 {-# LANGUAGE RelaxedPolyRec      #-}
 {-# LANGUAGE ScopedTypeVariables #-}
 {-# LANGUAGE TupleSections       #-}
@@ -17,7 +16,6 @@ Conversion of markdown-formatted plain text to 'Pandoc' document.
 -}
 module Text.Pandoc.Readers.Markdown ( readMarkdown, yamlToMeta ) where
 
-import Prelude
 import Control.Monad
 import Control.Monad.Except (throwError)
 import Data.Char (isAlphaNum, isPunctuation, isSpace)
diff --git a/src/Text/Pandoc/Readers/MediaWiki.hs b/src/Text/Pandoc/Readers/MediaWiki.hs
index 42f797db7..61c9adb53 100644
--- a/src/Text/Pandoc/Readers/MediaWiki.hs
+++ b/src/Text/Pandoc/Readers/MediaWiki.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE RelaxedPolyRec    #-}
 -- RelaxedPolyRec needed for inlinesBetween on GHC < 7
@@ -20,7 +19,6 @@ _ parse templates?
 -}
 module Text.Pandoc.Readers.MediaWiki ( readMediaWiki ) where
 
-import Prelude
 import Control.Monad
 import Control.Monad.Except (throwError)
 import Data.Char (isDigit, isSpace)
diff --git a/src/Text/Pandoc/Readers/Metadata.hs b/src/Text/Pandoc/Readers/Metadata.hs
index c3750fc24..a33786b91 100644
--- a/src/Text/Pandoc/Readers/Metadata.hs
+++ b/src/Text/Pandoc/Readers/Metadata.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude   #-}
 {-# LANGUAGE RelaxedPolyRec      #-}
 {-# LANGUAGE ScopedTypeVariables #-}
 {-# LANGUAGE OverloadedStrings   #-}
@@ -15,7 +14,6 @@ Parse YAML/JSON metadata to 'Pandoc' 'Meta'.
 -}
 module Text.Pandoc.Readers.Metadata ( yamlBsToMeta ) where
 
-import Prelude
 import Control.Monad
 import Control.Monad.Except (throwError)
 import qualified Data.ByteString.Lazy as BL
diff --git a/src/Text/Pandoc/Readers/Muse.hs b/src/Text/Pandoc/Readers/Muse.hs
index 3d0960413..a03a3a4c3 100644
--- a/src/Text/Pandoc/Readers/Muse.hs
+++ b/src/Text/Pandoc/Readers/Muse.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE FlexibleContexts  #-}
 {-# LANGUAGE TupleSections     #-}
 {-# LANGUAGE OverloadedStrings #-}
@@ -19,7 +18,6 @@ TODO:
 -}
 module Text.Pandoc.Readers.Muse (readMuse) where
 
-import Prelude
 import Control.Monad
 import Control.Monad.Reader
 import Control.Monad.Except (throwError)
diff --git a/src/Text/Pandoc/Readers/Native.hs b/src/Text/Pandoc/Readers/Native.hs
index c9cb530dc..9bcf905c2 100644
--- a/src/Text/Pandoc/Readers/Native.hs
+++ b/src/Text/Pandoc/Readers/Native.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE OverloadedStrings #-}
 {- |
    Module      : Text.Pandoc.Readers.Native
@@ -14,7 +13,6 @@ Conversion of a string representation of a pandoc type (@Pandoc@,
 -}
 module Text.Pandoc.Readers.Native ( readNative ) where
 
-import Prelude
 import Text.Pandoc.Definition
 import Text.Pandoc.Options (ReaderOptions)
 import Text.Pandoc.Shared (safeRead)
diff --git a/src/Text/Pandoc/Readers/OPML.hs b/src/Text/Pandoc/Readers/OPML.hs
index b243fe550..783946c7e 100644
--- a/src/Text/Pandoc/Readers/OPML.hs
+++ b/src/Text/Pandoc/Readers/OPML.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE OverloadedStrings #-}
 {- |
    Module      : Text.Pandoc.Readers.OPML
@@ -13,7 +12,6 @@ Conversion of OPML to 'Pandoc' document.
 -}
 
 module Text.Pandoc.Readers.OPML ( readOPML ) where
-import Prelude
 import Control.Monad.State.Strict
 import Data.Char (toUpper)
 import Data.Default
diff --git a/src/Text/Pandoc/Readers/Odt.hs b/src/Text/Pandoc/Readers/Odt.hs
index f9b78d5bf..8397877a1 100644
--- a/src/Text/Pandoc/Readers/Odt.hs
+++ b/src/Text/Pandoc/Readers/Odt.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE PatternGuards     #-}
 {-# LANGUAGE OverloadedStrings #-}
 {- |
@@ -15,7 +14,6 @@ Entry point to the odt reader.
 
 module Text.Pandoc.Readers.Odt ( readOdt ) where
 
-import Prelude
 import Codec.Archive.Zip
 import qualified Text.XML.Light as XML
 
diff --git a/src/Text/Pandoc/Readers/Odt/Arrows/State.hs b/src/Text/Pandoc/Readers/Odt/Arrows/State.hs
index bd4f6dc59..93c6b5e79 100644
--- a/src/Text/Pandoc/Readers/Odt/Arrows/State.hs
+++ b/src/Text/Pandoc/Readers/Odt/Arrows/State.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE FlexibleInstances #-}
 {-# LANGUAGE TupleSections     #-}
 {- |
@@ -20,7 +19,6 @@ faster and easier to implement this way.
 
 module Text.Pandoc.Readers.Odt.Arrows.State where
 
-import Prelude
 import Control.Arrow
 import qualified Control.Category as Cat
 import Control.Monad
diff --git a/src/Text/Pandoc/Readers/Odt/Arrows/Utils.hs b/src/Text/Pandoc/Readers/Odt/Arrows/Utils.hs
index ba212ebba..02a5fb8a5 100644
--- a/src/Text/Pandoc/Readers/Odt/Arrows/Utils.hs
+++ b/src/Text/Pandoc/Readers/Odt/Arrows/Utils.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {- |
    Module      : Text.Pandoc.Readers.Odt.Arrows.Utils
    Copyright   : Copyright (C) 2015 Martin Linnemann
@@ -22,7 +21,6 @@ with an equivalent return value.
 -- We export everything
 module Text.Pandoc.Readers.Odt.Arrows.Utils where
 
-import Prelude
 import Control.Arrow
 import Control.Monad (join)
 
diff --git a/src/Text/Pandoc/Readers/Odt/ContentReader.hs b/src/Text/Pandoc/Readers/Odt/ContentReader.hs
index 167d4403c..69c8e2924 100644
--- a/src/Text/Pandoc/Readers/Odt/ContentReader.hs
+++ b/src/Text/Pandoc/Readers/Odt/ContentReader.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE Arrows            #-}
 {-# LANGUAGE DeriveFoldable    #-}
 {-# LANGUAGE GeneralizedNewtypeDeriving #-}
@@ -24,7 +23,6 @@ module Text.Pandoc.Readers.Odt.ContentReader
 , read_body
 ) where
 
-import Prelude
 import Control.Applicative hiding (liftA, liftA2, liftA3)
 import Control.Arrow
 
diff --git a/src/Text/Pandoc/Readers/Odt/Generic/Fallible.hs b/src/Text/Pandoc/Readers/Odt/Generic/Fallible.hs
index 11a181805..2ec2174a6 100644
--- a/src/Text/Pandoc/Readers/Odt/Generic/Fallible.hs
+++ b/src/Text/Pandoc/Readers/Odt/Generic/Fallible.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {- |
    Module      : Text.Pandoc.Readers.Odt.Generic.Fallible
    Copyright   : Copyright (C) 2015 Martin Linnemann
@@ -19,7 +18,6 @@ compatible instances of "ArrowChoice".
 
 -- We export everything
 module Text.Pandoc.Readers.Odt.Generic.Fallible where
-import Prelude
 
 -- | Default for now. Will probably become a class at some point.
 type Failure = ()
diff --git a/src/Text/Pandoc/Readers/Odt/Generic/Namespaces.hs b/src/Text/Pandoc/Readers/Odt/Generic/Namespaces.hs
index fd81bfb52..77174c793 100644
--- a/src/Text/Pandoc/Readers/Odt/Generic/Namespaces.hs
+++ b/src/Text/Pandoc/Readers/Odt/Generic/Namespaces.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {- |
    Module      : Text.Pandoc.Readers.Odt.Generic.Namespaces
    Copyright   : Copyright (C) 2015 Martin Linnemann
@@ -14,7 +13,6 @@ typesafe Haskell namespace identifiers and unsafe "real world" namespaces.
 
 module Text.Pandoc.Readers.Odt.Generic.Namespaces where
 
-import Prelude
 import qualified Data.Map as M
 
 --
diff --git a/src/Text/Pandoc/Readers/Odt/Generic/SetMap.hs b/src/Text/Pandoc/Readers/Odt/Generic/SetMap.hs
index 12d65695d..0e4fa0990 100644
--- a/src/Text/Pandoc/Readers/Odt/Generic/SetMap.hs
+++ b/src/Text/Pandoc/Readers/Odt/Generic/SetMap.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {- |
    Module      : Text.Pandoc.Readers.Odt.Generic.SetMap
    Copyright   : Copyright (C) 2015 Martin Linnemann
@@ -13,7 +12,6 @@ A map of values to sets of values.
 
 module Text.Pandoc.Readers.Odt.Generic.SetMap where
 
-import Prelude
 import qualified Data.Map as M
 import qualified Data.Set as S
 
diff --git a/src/Text/Pandoc/Readers/Odt/Generic/Utils.hs b/src/Text/Pandoc/Readers/Odt/Generic/Utils.hs
index 5889f2d08..1999469ee 100644
--- a/src/Text/Pandoc/Readers/Odt/Generic/Utils.hs
+++ b/src/Text/Pandoc/Readers/Odt/Generic/Utils.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE TypeOperators #-}
 {-# LANGUAGE ViewPatterns  #-}
 {- |
@@ -30,7 +29,6 @@ module Text.Pandoc.Readers.Odt.Generic.Utils
 , composition
 ) where
 
-import Prelude
 import Control.Category (Category, (<<<), (>>>))
 import qualified Control.Category as Cat (id)
 import Control.Monad (msum)
diff --git a/src/Text/Pandoc/Readers/Odt/Generic/XMLConverter.hs b/src/Text/Pandoc/Readers/Odt/Generic/XMLConverter.hs
index 9b2d3411d..5583d64ce 100644
--- a/src/Text/Pandoc/Readers/Odt/Generic/XMLConverter.hs
+++ b/src/Text/Pandoc/Readers/Odt/Generic/XMLConverter.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE TupleSections   #-}
 {-# LANGUAGE GADTs           #-}
 {-# LANGUAGE PatternGuards   #-}
@@ -53,7 +52,6 @@ module Text.Pandoc.Readers.Odt.Generic.XMLConverter
 , matchContent
 ) where
 
-import Prelude
 import           Control.Applicative  hiding ( liftA, liftA2 )
 import           Control.Monad               ( MonadPlus )
 import           Control.Arrow
diff --git a/src/Text/Pandoc/Readers/Odt/Namespaces.hs b/src/Text/Pandoc/Readers/Odt/Namespaces.hs
index b1b16cadd..3a24a1162 100644
--- a/src/Text/Pandoc/Readers/Odt/Namespaces.hs
+++ b/src/Text/Pandoc/Readers/Odt/Namespaces.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {- |
    Module      : Text.Pandoc.Reader.Odt.Namespaces
    Copyright   : Copyright (C) 2015 Martin Linnemann
@@ -14,7 +13,6 @@ Namespaces used in odt files.
 module Text.Pandoc.Readers.Odt.Namespaces ( Namespace (..)
                                           ) where
 
-import Prelude
 import Data.List (isPrefixOf)
 import qualified Data.Map as M (empty, insert)
 import Data.Maybe (fromMaybe, listToMaybe)
diff --git a/src/Text/Pandoc/Readers/Odt/StyleReader.hs b/src/Text/Pandoc/Readers/Odt/StyleReader.hs
index c2eae0b82..46a777df1 100644
--- a/src/Text/Pandoc/Readers/Odt/StyleReader.hs
+++ b/src/Text/Pandoc/Readers/Odt/StyleReader.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE CPP             #-}
 {-# LANGUAGE Arrows          #-}
 {-# LANGUAGE RecordWildCards #-}
@@ -39,7 +38,6 @@ module Text.Pandoc.Readers.Odt.StyleReader
 , readStylesAt
 ) where
 
-import Prelude
 import Control.Applicative hiding (liftA, liftA2, liftA3)
 import Control.Arrow
 
diff --git a/src/Text/Pandoc/Readers/Org.hs b/src/Text/Pandoc/Readers/Org.hs
index 8b5c86580..9c8404138 100644
--- a/src/Text/Pandoc/Readers/Org.hs
+++ b/src/Text/Pandoc/Readers/Org.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE OverloadedStrings #-}
 {- |
    Module      : Text.Pandoc.Readers.Org
@@ -11,7 +10,6 @@ Conversion of org-mode formatted plain text to 'Pandoc' document.
 -}
 module Text.Pandoc.Readers.Org ( readOrg ) where
 
-import Prelude
 import Text.Pandoc.Readers.Org.Blocks (blockList, meta)
 import Text.Pandoc.Readers.Org.ParserState (optionsToParserState)
 import Text.Pandoc.Readers.Org.Parsing (OrgParser, readWithM)
diff --git a/src/Text/Pandoc/Readers/Org/BlockStarts.hs b/src/Text/Pandoc/Readers/Org/BlockStarts.hs
index 9e5b63a24..8f7cac6ea 100644
--- a/src/Text/Pandoc/Readers/Org/BlockStarts.hs
+++ b/src/Text/Pandoc/Readers/Org/BlockStarts.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE OverloadedStrings #-}
 {- |
    Module      : Text.Pandoc.Readers.Org.BlockStarts
@@ -24,7 +23,6 @@ module Text.Pandoc.Readers.Org.BlockStarts
   , endOfBlock
   ) where
 
-import Prelude
 import Control.Monad (void)
 import Data.Text (Text)
 import qualified Data.Text as T
diff --git a/src/Text/Pandoc/Readers/Org/Blocks.hs b/src/Text/Pandoc/Readers/Org/Blocks.hs
index 055dbedbb..71298c1d1 100644
--- a/src/Text/Pandoc/Readers/Org/Blocks.hs
+++ b/src/Text/Pandoc/Readers/Org/Blocks.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE FlexibleContexts  #-}
 {-# LANGUAGE RecordWildCards   #-}
 {-# LANGUAGE OverloadedStrings #-}
@@ -16,7 +15,6 @@ module Text.Pandoc.Readers.Org.Blocks
   , meta
   ) where
 
-import Prelude
 import Text.Pandoc.Readers.Org.BlockStarts
 import Text.Pandoc.Readers.Org.DocumentTree (documentTree,
                                              unprunedHeadlineToBlocks)
diff --git a/src/Text/Pandoc/Readers/Org/DocumentTree.hs b/src/Text/Pandoc/Readers/Org/DocumentTree.hs
index c406c4367..36d270b2e 100644
--- a/src/Text/Pandoc/Readers/Org/DocumentTree.hs
+++ b/src/Text/Pandoc/Readers/Org/DocumentTree.hs
@@ -1,5 +1,4 @@
 {-# LANGUAGE FlexibleContexts  #-}
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE TupleSections     #-}
 {- |
@@ -16,7 +15,6 @@ module Text.Pandoc.Readers.Org.DocumentTree
   , unprunedHeadlineToBlocks
   ) where
 
-import Prelude
 import Control.Arrow ((***), first)
 import Control.Monad (guard)
 import Data.List (intersperse)
diff --git a/src/Text/Pandoc/Readers/Org/ExportSettings.hs b/src/Text/Pandoc/Readers/Org/ExportSettings.hs
index 186bbcc31..dbd56970e 100644
--- a/src/Text/Pandoc/Readers/Org/ExportSettings.hs
+++ b/src/Text/Pandoc/Readers/Org/ExportSettings.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE OverloadedStrings #-}
 {- |
    Module      : Text.Pandoc.Readers.Org.ExportSettings
@@ -13,7 +12,6 @@ module Text.Pandoc.Readers.Org.ExportSettings
   ( exportSettings
   ) where
 
-import Prelude
 import Text.Pandoc.Class (PandocMonad, report)
 import Text.Pandoc.Logging (LogMessage (UnknownOrgExportOption))
 import Text.Pandoc.Readers.Org.ParserState
diff --git a/src/Text/Pandoc/Readers/Org/Inlines.hs b/src/Text/Pandoc/Readers/Org/Inlines.hs
index a549be08a..725b6da72 100644
--- a/src/Text/Pandoc/Readers/Org/Inlines.hs
+++ b/src/Text/Pandoc/Readers/Org/Inlines.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE OverloadedStrings #-}
 {- |
    Module      : Text.Pandoc.Readers.Org.Inlines
@@ -16,7 +15,6 @@ module Text.Pandoc.Readers.Org.Inlines
   , linkTarget
   ) where
 
-import Prelude
 import Text.Pandoc.Readers.Org.BlockStarts (endOfBlock, noteMarker)
 import Text.Pandoc.Readers.Org.ParserState
 import Text.Pandoc.Readers.Org.Parsing
diff --git a/src/Text/Pandoc/Readers/Org/Meta.hs b/src/Text/Pandoc/Readers/Org/Meta.hs
index a0ea97296..7c158f492 100644
--- a/src/Text/Pandoc/Readers/Org/Meta.hs
+++ b/src/Text/Pandoc/Readers/Org/Meta.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE FlexibleContexts  #-}
 {-# LANGUAGE TupleSections     #-}
 {-# LANGUAGE OverloadedStrings #-}
@@ -17,7 +16,6 @@ module Text.Pandoc.Readers.Org.Meta
   , metaLine
   ) where
 
-import Prelude
 import Text.Pandoc.Readers.Org.BlockStarts
 import Text.Pandoc.Readers.Org.ExportSettings (exportSettings)
 import Text.Pandoc.Readers.Org.Inlines
diff --git a/src/Text/Pandoc/Readers/Org/ParserState.hs b/src/Text/Pandoc/Readers/Org/ParserState.hs
index e09080199..0e2175da9 100644
--- a/src/Text/Pandoc/Readers/Org/ParserState.hs
+++ b/src/Text/Pandoc/Readers/Org/ParserState.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude     #-}
 {-# LANGUAGE FlexibleInstances     #-}
 {-# LANGUAGE MultiParamTypeClasses #-}
 {-# LANGUAGE OverloadedStrings     #-}
@@ -39,7 +38,6 @@ module Text.Pandoc.Readers.Org.ParserState
   , optionsToParserState
   ) where
 
-import Prelude
 import Control.Monad.Reader (ReaderT, asks, local)
 
 import Data.Default (Default (..))
diff --git a/src/Text/Pandoc/Readers/Org/Parsing.hs b/src/Text/Pandoc/Readers/Org/Parsing.hs
index 39a4740a6..bce71c24d 100644
--- a/src/Text/Pandoc/Readers/Org/Parsing.hs
+++ b/src/Text/Pandoc/Readers/Org/Parsing.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {- |
    Module      : Text.Pandoc.Readers.Org.Parsing
    Copyright   : Copyright (C) 2014-2020 Albert Krewinkel
@@ -104,7 +103,6 @@ module Text.Pandoc.Readers.Org.Parsing
   , getPosition
   ) where
 
-import Prelude
 import Data.Text (Text)
 import Text.Pandoc.Readers.Org.ParserState
 
diff --git a/src/Text/Pandoc/Readers/Org/Shared.hs b/src/Text/Pandoc/Readers/Org/Shared.hs
index e811131da..7ddf3738f 100644
--- a/src/Text/Pandoc/Readers/Org/Shared.hs
+++ b/src/Text/Pandoc/Readers/Org/Shared.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE OverloadedStrings #-}
 {- |
    Module      : Text.Pandoc.Readers.Org.Shared
@@ -17,7 +16,6 @@ module Text.Pandoc.Readers.Org.Shared
   , exportsCode
   ) where
 
-import Prelude
 import Data.Char (isAlphaNum)
 import Data.Text (Text)
 import qualified Data.Text as T
diff --git a/src/Text/Pandoc/Readers/RST.hs b/src/Text/Pandoc/Readers/RST.hs
index c7f4cbd4d..aeae6c304 100644
--- a/src/Text/Pandoc/Readers/RST.hs
+++ b/src/Text/Pandoc/Readers/RST.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude   #-}
 {-# LANGUAGE FlexibleContexts    #-}
 {-# LANGUAGE OverloadedStrings   #-}
 {-# LANGUAGE ScopedTypeVariables #-}
@@ -15,7 +14,6 @@
 Conversion from reStructuredText to 'Pandoc' document.
 -}
 module Text.Pandoc.Readers.RST ( readRST ) where
-import Prelude
 import Control.Arrow (second)
 import Control.Monad (forM_, guard, liftM, mplus, mzero, when)
 import Control.Monad.Except (throwError)
diff --git a/src/Text/Pandoc/Readers/Roff.hs b/src/Text/Pandoc/Readers/Roff.hs
index bf254e72c..386503d47 100644
--- a/src/Text/Pandoc/Readers/Roff.hs
+++ b/src/Text/Pandoc/Readers/Roff.hs
@@ -28,7 +28,6 @@ module Text.Pandoc.Readers.Roff
   )
 where
 
-import Prelude
 import Safe (lastDef)
 import Control.Monad (void, mzero, mplus, guard)
 import Control.Monad.Except (throwError)
diff --git a/src/Text/Pandoc/Readers/TWiki.hs b/src/Text/Pandoc/Readers/TWiki.hs
index d587bc41b..2b419edc0 100644
--- a/src/Text/Pandoc/Readers/TWiki.hs
+++ b/src/Text/Pandoc/Readers/TWiki.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE FlexibleContexts  #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE RelaxedPolyRec    #-}
@@ -17,7 +16,6 @@ Conversion of twiki text to 'Pandoc' document.
 module Text.Pandoc.Readers.TWiki ( readTWiki
                                  ) where
 
-import Prelude
 import Control.Monad
 import Control.Monad.Except (throwError)
 import Data.Char (isAlphaNum)
diff --git a/src/Text/Pandoc/Readers/Textile.hs b/src/Text/Pandoc/Readers/Textile.hs
index a95e4a1f1..f3fac6550 100644
--- a/src/Text/Pandoc/Readers/Textile.hs
+++ b/src/Text/Pandoc/Readers/Textile.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE ViewPatterns      #-}
 {- |
@@ -36,7 +35,6 @@ TODO : refactor common patterns across readers :
 
 
 module Text.Pandoc.Readers.Textile ( readTextile) where
-import Prelude
 import Control.Monad (guard, liftM)
 import Control.Monad.Except (throwError)
 import Data.Char (digitToInt, isUpper)
diff --git a/src/Text/Pandoc/Readers/TikiWiki.hs b/src/Text/Pandoc/Readers/TikiWiki.hs
index 438191ba1..27d7772f0 100644
--- a/src/Text/Pandoc/Readers/TikiWiki.hs
+++ b/src/Text/Pandoc/Readers/TikiWiki.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE FlexibleContexts  #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE RelaxedPolyRec    #-}
@@ -18,7 +17,6 @@ Conversion of TikiWiki text to 'Pandoc' document.
 module Text.Pandoc.Readers.TikiWiki ( readTikiWiki
                                     ) where
 
-import Prelude
 import Control.Monad
 import Control.Monad.Except (throwError)
 import qualified Data.Foldable as F
diff --git a/src/Text/Pandoc/Readers/Txt2Tags.hs b/src/Text/Pandoc/Readers/Txt2Tags.hs
index 996a818fd..984148ea6 100644
--- a/src/Text/Pandoc/Readers/Txt2Tags.hs
+++ b/src/Text/Pandoc/Readers/Txt2Tags.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE OverloadedStrings #-}
 {- |
    Module      : Text.Pandoc.Readers.Txt2Tags
@@ -15,7 +14,6 @@ module Text.Pandoc.Readers.Txt2Tags ( readTxt2Tags
                                     )
                                     where
 
-import Prelude
 import Control.Monad (guard, void, when)
 import Control.Monad.Except (catchError, throwError)
 import Control.Monad.Reader (Reader, asks, runReader)
diff --git a/src/Text/Pandoc/Readers/Vimwiki.hs b/src/Text/Pandoc/Readers/Vimwiki.hs
index e4f9d8a90..3c86b40bb 100644
--- a/src/Text/Pandoc/Readers/Vimwiki.hs
+++ b/src/Text/Pandoc/Readers/Vimwiki.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE CPP #-}
 {- |
@@ -48,7 +47,6 @@ Conversion of vimwiki text to 'Pandoc' document.
 
 module Text.Pandoc.Readers.Vimwiki ( readVimwiki
                                  ) where
-import Prelude
 import Control.Monad (guard)
 import Control.Monad.Except (throwError)
 import Data.Default