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* PandocMonad: remove outdated check for base version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.

41 files changed, 0 insertions, 82 deletions

diff --git a/src/Text/Pandoc/Writers/AsciiDoc.hs b/src/Text/Pandoc/Writers/AsciiDoc.hs
index c77b843f8..14fc7ff76 100644
--- a/src/Text/Pandoc/Writers/AsciiDoc.hs
+++ b/src/Text/Pandoc/Writers/AsciiDoc.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE OverloadedStrings #-}
 {- |
    Module      : Text.Pandoc.Writers.AsciiDoc
@@ -20,7 +19,6 @@ that it has omitted the construct.
 AsciiDoc:  <http://www.methods.co.nz/asciidoc/>
 -}
 module Text.Pandoc.Writers.AsciiDoc (writeAsciiDoc, writeAsciiDoctor) where
-import Prelude
 import Control.Monad.State.Strict
 import Data.Char (isPunctuation, isSpace)
 import Data.List (intercalate, intersperse)
diff --git a/src/Text/Pandoc/Writers/CommonMark.hs b/src/Text/Pandoc/Writers/CommonMark.hs
index 2b0ca0663..6c46051c0 100644
--- a/src/Text/Pandoc/Writers/CommonMark.hs
+++ b/src/Text/Pandoc/Writers/CommonMark.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE ViewPatterns      #-}
 {- |
@@ -16,7 +15,6 @@ CommonMark:  <http://commonmark.org>
 -}
 module Text.Pandoc.Writers.CommonMark (writeCommonMark) where
 
-import Prelude
 import CMarkGFM
 import Control.Monad.State.Strict (State, get, modify, runState)
 import Data.Char (isAscii)
diff --git a/src/Text/Pandoc/Writers/ConTeXt.hs b/src/Text/Pandoc/Writers/ConTeXt.hs
index ab3f0232f..8a464de19 100644
--- a/src/Text/Pandoc/Writers/ConTeXt.hs
+++ b/src/Text/Pandoc/Writers/ConTeXt.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude   #-}
 {-# LANGUAGE OverloadedStrings   #-}
 {-# LANGUAGE ScopedTypeVariables #-}
 {-# LANGUAGE ViewPatterns        #-}
@@ -14,7 +13,6 @@
 Conversion of 'Pandoc' format into ConTeXt.
 -}
 module Text.Pandoc.Writers.ConTeXt ( writeConTeXt ) where
-import Prelude
 import Control.Monad.State.Strict
 import Data.Char (ord, isDigit)
 import Data.List (intersperse)
diff --git a/src/Text/Pandoc/Writers/Custom.hs b/src/Text/Pandoc/Writers/Custom.hs
index d01b4f783..52109dd19 100644
--- a/src/Text/Pandoc/Writers/Custom.hs
+++ b/src/Text/Pandoc/Writers/Custom.hs
@@ -1,5 +1,4 @@
 {-# LANGUAGE FlexibleInstances  #-}
-{-# LANGUAGE NoImplicitPrelude  #-}
 {-# LANGUAGE OverloadedStrings  #-}
 {- |
    Module      : Text.Pandoc.Writers.Custom
@@ -14,7 +13,6 @@ Conversion of 'Pandoc' documents to custom markup using
 a lua writer.
 -}
 module Text.Pandoc.Writers.Custom ( writeCustom ) where
-import Prelude
 import Control.Arrow ((***))
 import Control.Exception
 import Control.Monad (when)
diff --git a/src/Text/Pandoc/Writers/Docbook.hs b/src/Text/Pandoc/Writers/Docbook.hs
index 9e7f3a618..d049b56d3 100644
--- a/src/Text/Pandoc/Writers/Docbook.hs
+++ b/src/Text/Pandoc/Writers/Docbook.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE PatternGuards     #-}
 {-# LANGUAGE ViewPatterns      #-}
@@ -14,7 +13,6 @@
 Conversion of 'Pandoc' documents to Docbook XML.
 -}
 module Text.Pandoc.Writers.Docbook ( writeDocbook4, writeDocbook5 ) where
-import Prelude
 import Control.Monad.Reader
 import Data.Generics (everywhere, mkT)
 import Data.Monoid (Any (..))
diff --git a/src/Text/Pandoc/Writers/Docx.hs b/src/Text/Pandoc/Writers/Docx.hs
index e6725ee99..ff47a6b6a 100644
--- a/src/Text/Pandoc/Writers/Docx.hs
+++ b/src/Text/Pandoc/Writers/Docx.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE PatternGuards       #-}
 {-# LANGUAGE RankNTypes          #-}
 {-# LANGUAGE ScopedTypeVariables #-}
@@ -17,7 +16,6 @@
 Conversion of 'Pandoc' documents to docx.
 -}
 module Text.Pandoc.Writers.Docx ( writeDocx ) where
-import Prelude
 import Codec.Archive.Zip
 import Control.Applicative ((<|>))
 import Control.Monad.Except (catchError, throwError)
diff --git a/src/Text/Pandoc/Writers/Docx/StyleMap.hs b/src/Text/Pandoc/Writers/Docx/StyleMap.hs
index 38d7222cf..c3c54c7e5 100644
--- a/src/Text/Pandoc/Writers/Docx/StyleMap.hs
+++ b/src/Text/Pandoc/Writers/Docx/StyleMap.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE FlexibleContexts  #-}
 {- |
    Module : Text.Pandoc.Writers.Docx.StyleMap
@@ -30,7 +29,6 @@ import qualified Data.Map as M
 import qualified Data.Text as T
 import Data.String
 import Data.Char (isSpace)
-import Prelude
 
 data StyleMaps = StyleMaps { smCharStyle :: CharStyleNameMap, smParaStyle :: ParaStyleNameMap }
 type ParaStyleNameMap = M.Map ParaStyleName ParStyle
diff --git a/src/Text/Pandoc/Writers/DokuWiki.hs b/src/Text/Pandoc/Writers/DokuWiki.hs
index 1963c0050..3cfb7d8c1 100644
--- a/src/Text/Pandoc/Writers/DokuWiki.hs
+++ b/src/Text/Pandoc/Writers/DokuWiki.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE OverloadedStrings #-}
 {- |
    Module      : Text.Pandoc.Writers.DokuWiki
@@ -23,7 +22,6 @@ DokuWiki:  <https://www.dokuwiki.org/dokuwiki>
 -}
 
 module Text.Pandoc.Writers.DokuWiki ( writeDokuWiki ) where
-import Prelude
 import Control.Monad (zipWithM)
 import Control.Monad.Reader (ReaderT, asks, local, runReaderT)
 import Control.Monad.State.Strict (StateT, evalStateT)
diff --git a/src/Text/Pandoc/Writers/EPUB.hs b/src/Text/Pandoc/Writers/EPUB.hs
index 9820f7a54..f5153a753 100644
--- a/src/Text/Pandoc/Writers/EPUB.hs
+++ b/src/Text/Pandoc/Writers/EPUB.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE CPP                 #-}
 {-# LANGUAGE FlexibleContexts    #-}
 {-# LANGUAGE PatternGuards       #-}
@@ -16,7 +15,6 @@
 Conversion of 'Pandoc' documents to EPUB.
 -}
 module Text.Pandoc.Writers.EPUB ( writeEPUB2, writeEPUB3 ) where
-import Prelude
 import Codec.Archive.Zip (Entry, addEntryToArchive, eRelativePath, emptyArchive,
                           fromArchive, fromEntry, toEntry)
 import Control.Applicative ( (<|>) )
diff --git a/src/Text/Pandoc/Writers/FB2.hs b/src/Text/Pandoc/Writers/FB2.hs
index 3a079722c..0a64c3bef 100644
--- a/src/Text/Pandoc/Writers/FB2.hs
+++ b/src/Text/Pandoc/Writers/FB2.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE PatternGuards     #-}
 {-# LANGUAGE OverloadedStrings #-}
 {- |
@@ -19,7 +18,6 @@ FictionBook is an XML-based e-book format. For more information see:
 -}
 module Text.Pandoc.Writers.FB2 (writeFB2)  where
 
-import Prelude
 import Control.Monad (zipWithM)
 import Control.Monad.Except (catchError)
 import Control.Monad.State.Strict (StateT, evalStateT, get, gets, lift, liftM, modify)
diff --git a/src/Text/Pandoc/Writers/HTML.hs b/src/Text/Pandoc/Writers/HTML.hs
index 865a24278..8afeb69d0 100644
--- a/src/Text/Pandoc/Writers/HTML.hs
+++ b/src/Text/Pandoc/Writers/HTML.hs
@@ -1,5 +1,4 @@
 {-# LANGUAGE MultiWayIf          #-}
-{-# LANGUAGE NoImplicitPrelude   #-}
 {-# LANGUAGE OverloadedStrings   #-}
 {-# LANGUAGE ScopedTypeVariables #-}
 {-# LANGUAGE ViewPatterns        #-}
@@ -39,7 +38,6 @@ import Network.HTTP (urlEncode)
 import Network.URI (URI (..), parseURIReference)
 import Numeric (showHex)
 import Text.DocLayout (render, literal)
-import Prelude
 import Text.Blaze.Internal (MarkupM (Empty), customLeaf, customParent)
 import Text.DocTemplates (FromContext (lookupContext), Context (..))
 import Text.Blaze.Html hiding (contents)
diff --git a/src/Text/Pandoc/Writers/Haddock.hs b/src/Text/Pandoc/Writers/Haddock.hs
index e6c07aaf7..e348f7ce6 100644
--- a/src/Text/Pandoc/Writers/Haddock.hs
+++ b/src/Text/Pandoc/Writers/Haddock.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE OverloadedStrings   #-}
 {-# LANGUAGE ScopedTypeVariables #-}
 {- |
@@ -15,7 +14,6 @@ Conversion of 'Pandoc' documents to haddock markup.
 Haddock:  <http://www.haskell.org/haddock/doc/html/>
 -}
 module Text.Pandoc.Writers.Haddock (writeHaddock) where
-import Prelude
 import Control.Monad.State.Strict
 import Data.Default
 import Data.Text (Text)
diff --git a/src/Text/Pandoc/Writers/ICML.hs b/src/Text/Pandoc/Writers/ICML.hs
index 46217bc28..6aa97d4f1 100644
--- a/src/Text/Pandoc/Writers/ICML.hs
+++ b/src/Text/Pandoc/Writers/ICML.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE FlexibleContexts #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE ScopedTypeVariables #-}
@@ -18,7 +17,6 @@ InCopy is the companion word-processor to Adobe InDesign and ICML documents can
 into InDesign with File -> Place.
 -}
 module Text.Pandoc.Writers.ICML (writeICML) where
-import Prelude
 import Control.Monad.Except (catchError)
 import Control.Monad.State.Strict
 import Data.List (intersperse)
diff --git a/src/Text/Pandoc/Writers/Ipynb.hs b/src/Text/Pandoc/Writers/Ipynb.hs
index 14bd95e70..f6910d634 100644
--- a/src/Text/Pandoc/Writers/Ipynb.hs
+++ b/src/Text/Pandoc/Writers/Ipynb.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE ScopedTypeVariables #-}
 {- |
@@ -15,7 +14,6 @@ Ipynb (Jupyter notebook JSON format) writer for pandoc.
 -}
 module Text.Pandoc.Writers.Ipynb ( writeIpynb )
 where
-import Prelude
 import Control.Monad.State
 import qualified Data.Map as M
 import Data.Maybe (catMaybes, fromMaybe)
diff --git a/src/Text/Pandoc/Writers/JATS.hs b/src/Text/Pandoc/Writers/JATS.hs
index 49ace4636..087947f3f 100644
--- a/src/Text/Pandoc/Writers/JATS.hs
+++ b/src/Text/Pandoc/Writers/JATS.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE ScopedTypeVariables #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE ViewPatterns #-}
@@ -21,7 +20,6 @@ module Text.Pandoc.Writers.JATS
   , writeJatsPublishing
   , writeJatsArticleAuthoring
   ) where
-import Prelude
 import Control.Monad.Reader
 import Control.Monad.State
 import Data.Generics (everywhere, mkT)
diff --git a/src/Text/Pandoc/Writers/Jira.hs b/src/Text/Pandoc/Writers/Jira.hs
index a1aafc33f..c6216178f 100644
--- a/src/Text/Pandoc/Writers/Jira.hs
+++ b/src/Text/Pandoc/Writers/Jira.hs
@@ -1,6 +1,5 @@
 {-# LANGUAGE LambdaCase #-}
 {-# LANGUAGE OverloadedStrings #-}
-{-# LANGUAGE NoImplicitPrelude #-}
 {- |
    Module      : Text.Pandoc.Writers.Jira
    Copyright   : © 2010-2020 Albert Krewinkel, John MacFarlane
@@ -16,7 +15,6 @@ JIRA:
 <https://jira.atlassian.com/secure/WikiRendererHelpAction.jspa?section=all>
 -}
 module Text.Pandoc.Writers.Jira ( writeJira ) where
-import Prelude
 import Control.Monad.Reader (ReaderT, ask, asks, runReaderT)
 import Control.Monad.State.Strict (StateT, evalStateT, gets, modify)
 import Data.Foldable (find)
diff --git a/src/Text/Pandoc/Writers/LaTeX.hs b/src/Text/Pandoc/Writers/LaTeX.hs
index bce647a67..eacc17785 100644
--- a/src/Text/Pandoc/Writers/LaTeX.hs
+++ b/src/Text/Pandoc/Writers/LaTeX.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE OverloadedStrings   #-}
 {-# LANGUAGE PatternGuards       #-}
 {-# LANGUAGE ScopedTypeVariables #-}
@@ -18,7 +17,6 @@ module Text.Pandoc.Writers.LaTeX (
     writeLaTeX
   , writeBeamer
   ) where
-import Prelude
 import Control.Applicative ((<|>))
 import Control.Monad.State.Strict
 import Data.Monoid (Any(..))
diff --git a/src/Text/Pandoc/Writers/Man.hs b/src/Text/Pandoc/Writers/Man.hs
index 644c1049e..438a3a5f9 100644
--- a/src/Text/Pandoc/Writers/Man.hs
+++ b/src/Text/Pandoc/Writers/Man.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE ViewPatterns      #-}
 {- |
@@ -14,7 +13,6 @@ Conversion of 'Pandoc' documents to roff man page format.
 
 -}
 module Text.Pandoc.Writers.Man ( writeMan ) where
-import Prelude
 import Control.Monad.State.Strict
 import Data.List (intersperse)
 import Data.Maybe (fromMaybe)
diff --git a/src/Text/Pandoc/Writers/Markdown.hs b/src/Text/Pandoc/Writers/Markdown.hs
index 2e3d70a75..6e720dfcf 100644
--- a/src/Text/Pandoc/Writers/Markdown.hs
+++ b/src/Text/Pandoc/Writers/Markdown.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude   #-}
 {-# LANGUAGE MultiWayIf          #-}
 {-# LANGUAGE OverloadedStrings   #-}
 {-# LANGUAGE ScopedTypeVariables #-}
@@ -18,7 +17,6 @@ Conversion of 'Pandoc' documents to markdown-formatted plain text.
 Markdown:  <http://daringfireball.net/projects/markdown/>
 -}
 module Text.Pandoc.Writers.Markdown (writeMarkdown, writePlain) where
-import Prelude
 import Control.Monad.Reader
 import Control.Monad.State.Strict
 import Data.Char (isAlphaNum)
diff --git a/src/Text/Pandoc/Writers/Math.hs b/src/Text/Pandoc/Writers/Math.hs
index 13b880ff6..02c1a0105 100644
--- a/src/Text/Pandoc/Writers/Math.hs
+++ b/src/Text/Pandoc/Writers/Math.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE OverloadedStrings #-}
 module Text.Pandoc.Writers.Math
   ( texMathToInlines
@@ -8,7 +7,6 @@ module Text.Pandoc.Writers.Math
   )
 where
 
-import Prelude
 import qualified Data.Text as T
 import Text.Pandoc.Class
 import Text.Pandoc.Definition
diff --git a/src/Text/Pandoc/Writers/MediaWiki.hs b/src/Text/Pandoc/Writers/MediaWiki.hs
index 1bbae6979..3b6708c7b 100644
--- a/src/Text/Pandoc/Writers/MediaWiki.hs
+++ b/src/Text/Pandoc/Writers/MediaWiki.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE ViewPatterns      #-}
 {- |
@@ -15,7 +14,6 @@ Conversion of 'Pandoc' documents to MediaWiki markup.
 MediaWiki:  <http://www.mediawiki.org/wiki/MediaWiki>
 -}
 module Text.Pandoc.Writers.MediaWiki ( writeMediaWiki, highlightingLangs ) where
-import Prelude
 import Control.Monad.Reader
 import Control.Monad.State.Strict
 import Data.Maybe (fromMaybe)
diff --git a/src/Text/Pandoc/Writers/Ms.hs b/src/Text/Pandoc/Writers/Ms.hs
index fbe0a8c99..ce4e47172 100644
--- a/src/Text/Pandoc/Writers/Ms.hs
+++ b/src/Text/Pandoc/Writers/Ms.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE ViewPatterns      #-}
 {- |
@@ -21,7 +20,6 @@ TODO:
 -}
 
 module Text.Pandoc.Writers.Ms ( writeMs ) where
-import Prelude
 import Control.Monad.State.Strict
 import Data.Char (isLower, isUpper, ord)
 import Data.List (intercalate, intersperse)
diff --git a/src/Text/Pandoc/Writers/Muse.hs b/src/Text/Pandoc/Writers/Muse.hs
index e47d98c59..7fa8c3bb1 100644
--- a/src/Text/Pandoc/Writers/Muse.hs
+++ b/src/Text/Pandoc/Writers/Muse.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE ViewPatterns      #-}
 {- |
@@ -26,7 +25,6 @@ However, @\<literal style="html">@ tag is used for HTML raw blocks
 even though it is supported only in Emacs Muse.
 -}
 module Text.Pandoc.Writers.Muse (writeMuse) where
-import Prelude
 import Control.Monad.Except (throwError)
 import Control.Monad.Reader
 import Control.Monad.State.Strict
diff --git a/src/Text/Pandoc/Writers/Native.hs b/src/Text/Pandoc/Writers/Native.hs
index f663a5cd8..0eeceab63 100644
--- a/src/Text/Pandoc/Writers/Native.hs
+++ b/src/Text/Pandoc/Writers/Native.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE OverloadedStrings #-}
 {- |
    Module      : Text.Pandoc.Writers.Native
@@ -13,7 +12,6 @@ Conversion of a 'Pandoc' document to a string representation.
 -}
 module Text.Pandoc.Writers.Native ( writeNative )
 where
-import Prelude
 import Data.List (intersperse)
 import Data.Text (Text)
 import Text.Pandoc.Class (PandocMonad)
diff --git a/src/Text/Pandoc/Writers/ODT.hs b/src/Text/Pandoc/Writers/ODT.hs
index a4ae1031c..d3a48eb3e 100644
--- a/src/Text/Pandoc/Writers/ODT.hs
+++ b/src/Text/Pandoc/Writers/ODT.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude   #-}
 {-# LANGUAGE ScopedTypeVariables #-}
 {-# LANGUAGE OverloadedStrings   #-}
 {- |
@@ -13,7 +12,6 @@
 Conversion of 'Pandoc' documents to ODT.
 -}
 module Text.Pandoc.Writers.ODT ( writeODT ) where
-import Prelude
 import Codec.Archive.Zip
 import Control.Monad.Except (catchError)
 import Control.Monad.State.Strict
diff --git a/src/Text/Pandoc/Writers/OOXML.hs b/src/Text/Pandoc/Writers/OOXML.hs
index b8062f8b2..41f50b44a 100644
--- a/src/Text/Pandoc/Writers/OOXML.hs
+++ b/src/Text/Pandoc/Writers/OOXML.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE OverloadedStrings #-}
 {- |
    Module      : Text.Pandoc.Writers.OOXML
@@ -24,7 +23,6 @@ module Text.Pandoc.Writers.OOXML ( mknode
                                  , fitToPage
                                  ) where
 
-import Prelude
 import Codec.Archive.Zip
 import Control.Monad.Reader
 import Control.Monad.Except (throwError)
diff --git a/src/Text/Pandoc/Writers/OPML.hs b/src/Text/Pandoc/Writers/OPML.hs
index 637c7806e..3bff205f2 100644
--- a/src/Text/Pandoc/Writers/OPML.hs
+++ b/src/Text/Pandoc/Writers/OPML.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE CPP               #-}
 {- |
@@ -13,7 +12,6 @@
 Conversion of 'Pandoc' documents to OPML XML.
 -}
 module Text.Pandoc.Writers.OPML ( writeOPML) where
-import Prelude
 import Data.Text (Text)
 import qualified Data.Text as T
 import qualified Text.Pandoc.Builder as B
diff --git a/src/Text/Pandoc/Writers/OpenDocument.hs b/src/Text/Pandoc/Writers/OpenDocument.hs
index 727e11627..5e2958ff0 100644
--- a/src/Text/Pandoc/Writers/OpenDocument.hs
+++ b/src/Text/Pandoc/Writers/OpenDocument.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE FlexibleContexts  #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE PatternGuards     #-}
@@ -15,7 +14,6 @@
 Conversion of 'Pandoc' documents to OpenDocument XML.
 -}
 module Text.Pandoc.Writers.OpenDocument ( writeOpenDocument ) where
-import Prelude
 import Control.Arrow ((***), (>>>))
 import Control.Monad.State.Strict hiding (when)
 import Data.Char (chr)
diff --git a/src/Text/Pandoc/Writers/Org.hs b/src/Text/Pandoc/Writers/Org.hs
index 8ca9ad89b..c09f2be9a 100644
--- a/src/Text/Pandoc/Writers/Org.hs
+++ b/src/Text/Pandoc/Writers/Org.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE OverloadedStrings #-}
 {- |
    Module      : Text.Pandoc.Writers.Org
@@ -16,7 +15,6 @@ Conversion of 'Pandoc' documents to Emacs Org-Mode.
 Org-Mode:  <http://orgmode.org>
 -}
 module Text.Pandoc.Writers.Org (writeOrg) where
-import Prelude
 import Control.Monad.State.Strict
 import Data.Char (isAlphaNum)
 import Data.List (intersect, intersperse, partition, transpose)
diff --git a/src/Text/Pandoc/Writers/Powerpoint.hs b/src/Text/Pandoc/Writers/Powerpoint.hs
index 932b5115c..9fbd7fb06 100644
--- a/src/Text/Pandoc/Writers/Powerpoint.hs
+++ b/src/Text/Pandoc/Writers/Powerpoint.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {- |
    Module      : Text.Pandoc.Writers.Powerpoint
    Copyright   : Copyright (C) 2017-2020 Jesse Rosenthal
@@ -22,7 +21,6 @@ This is a wrapper around two modules:
 
 module Text.Pandoc.Writers.Powerpoint (writePowerpoint) where
 
-import Prelude
 import Codec.Archive.Zip
 import Text.Pandoc.Definition
 import Text.Pandoc.Walk
diff --git a/src/Text/Pandoc/Writers/Powerpoint/Output.hs b/src/Text/Pandoc/Writers/Powerpoint/Output.hs
index 1dcd43305..b92494602 100644
--- a/src/Text/Pandoc/Writers/Powerpoint/Output.hs
+++ b/src/Text/Pandoc/Writers/Powerpoint/Output.hs
@@ -1,5 +1,4 @@
 {-# LANGUAGE OverloadedStrings #-}
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE PatternGuards #-}
 {- |
    Module      : Text.Pandoc.Writers.Powerpoint.Output
@@ -17,7 +16,6 @@ Text.Pandoc.Writers.Powerpoint.Presentation) to a zip archive.
 module Text.Pandoc.Writers.Powerpoint.Output ( presentationToArchive
                                              ) where
 
-import Prelude
 import Control.Monad.Except (throwError, catchError)
 import Control.Monad.Reader
 import Control.Monad.State
diff --git a/src/Text/Pandoc/Writers/Powerpoint/Presentation.hs b/src/Text/Pandoc/Writers/Powerpoint/Presentation.hs
index fc17a954e..84e7423ac 100644
--- a/src/Text/Pandoc/Writers/Powerpoint/Presentation.hs
+++ b/src/Text/Pandoc/Writers/Powerpoint/Presentation.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude          #-}
 {-# LANGUAGE OverloadedStrings          #-}
 {-# LANGUAGE PatternGuards              #-}
 {-# LANGUAGE ViewPatterns               #-}
@@ -43,7 +42,6 @@ module Text.Pandoc.Writers.Powerpoint.Presentation ( documentToPresentation
                                                    ) where
 
 
-import Prelude
 import Control.Monad.Reader
 import Control.Monad.State
 import Data.List (intercalate)
diff --git a/src/Text/Pandoc/Writers/RST.hs b/src/Text/Pandoc/Writers/RST.hs
index c57ea14b8..9d9e07470 100644
--- a/src/Text/Pandoc/Writers/RST.hs
+++ b/src/Text/Pandoc/Writers/RST.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE ViewPatterns      #-}
 {- |
@@ -15,7 +14,6 @@ Conversion of 'Pandoc' documents to reStructuredText.
 reStructuredText:  <http://docutils.sourceforge.net/rst.html>
 -}
 module Text.Pandoc.Writers.RST ( writeRST, flatten ) where
-import Prelude
 import Control.Monad.State.Strict
 import Data.Char (isSpace)
 import Data.List (transpose, intersperse)
diff --git a/src/Text/Pandoc/Writers/RTF.hs b/src/Text/Pandoc/Writers/RTF.hs
index 95d73b39a..508fd9aa9 100644
--- a/src/Text/Pandoc/Writers/RTF.hs
+++ b/src/Text/Pandoc/Writers/RTF.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude   #-}
 {-# LANGUAGE ScopedTypeVariables #-}
 {-# LANGUAGE OverloadedStrings   #-}
 {- |
@@ -14,7 +13,6 @@ Conversion of 'Pandoc' documents to RTF (rich text format).
 -}
 module Text.Pandoc.Writers.RTF ( writeRTF
                                ) where
-import Prelude
 import Control.Monad.Except (catchError, throwError)
 import Control.Monad
 import qualified Data.ByteString as B
diff --git a/src/Text/Pandoc/Writers/Roff.hs b/src/Text/Pandoc/Writers/Roff.hs
index eb5f0710f..6e06d55f0 100644
--- a/src/Text/Pandoc/Writers/Roff.hs
+++ b/src/Text/Pandoc/Writers/Roff.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE OverloadedStrings #-}
 {- |
    Module      : Text.Pandoc.Writers.Roff
@@ -21,7 +20,6 @@ module Text.Pandoc.Writers.Roff (
     , escapeString
     , withFontFeature
     ) where
-import Prelude
 import Data.Char (ord, isAscii)
 import Control.Monad.State.Strict
 import qualified Data.Map as Map
diff --git a/src/Text/Pandoc/Writers/Shared.hs b/src/Text/Pandoc/Writers/Shared.hs
index 4d7e66861..9ba6dcc8a 100644
--- a/src/Text/Pandoc/Writers/Shared.hs
+++ b/src/Text/Pandoc/Writers/Shared.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE FlexibleContexts #-}
 {-# LANGUAGE ScopedTypeVariables #-}
 {-# LANGUAGE OverloadedStrings #-}
@@ -37,7 +36,6 @@ module Text.Pandoc.Writers.Shared (
                      , endsWithPlain
                      )
 where
-import Prelude
 import Safe (lastMay)
 import qualified Data.ByteString.Lazy as BL
 import Data.Maybe (fromMaybe, isNothing)
diff --git a/src/Text/Pandoc/Writers/TEI.hs b/src/Text/Pandoc/Writers/TEI.hs
index 2dcb4640f..a5e0d18f2 100644
--- a/src/Text/Pandoc/Writers/TEI.hs
+++ b/src/Text/Pandoc/Writers/TEI.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE PatternGuards     #-}
 {- |
@@ -13,7 +12,6 @@
 Conversion of 'Pandoc' documents to Docbook XML.
 -}
 module Text.Pandoc.Writers.TEI (writeTEI) where
-import Prelude
 import Data.Text (Text)
 import qualified Data.Text as T
 import Text.Pandoc.Class (PandocMonad, report)
diff --git a/src/Text/Pandoc/Writers/Texinfo.hs b/src/Text/Pandoc/Writers/Texinfo.hs
index 2599ac321..fb29fb4d7 100644
--- a/src/Text/Pandoc/Writers/Texinfo.hs
+++ b/src/Text/Pandoc/Writers/Texinfo.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE OverloadedStrings #-}
 {- |
    Module      : Text.Pandoc.Writers.Texinfo
@@ -13,7 +12,6 @@
 Conversion of 'Pandoc' format into Texinfo.
 -}
 module Text.Pandoc.Writers.Texinfo ( writeTexinfo ) where
-import Prelude
 import Control.Monad.Except (throwError)
 import Control.Monad.State.Strict
 import Data.Char (chr, ord)
diff --git a/src/Text/Pandoc/Writers/Textile.hs b/src/Text/Pandoc/Writers/Textile.hs
index e5b345cf7..627fa2d73 100644
--- a/src/Text/Pandoc/Writers/Textile.hs
+++ b/src/Text/Pandoc/Writers/Textile.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE ViewPatterns      #-}
 {- |
@@ -15,7 +14,6 @@ Conversion of 'Pandoc' documents to Textile markup.
 Textile:  <http://thresholdstate.com/articles/4312/the-textile-reference-manual>
 -}
 module Text.Pandoc.Writers.Textile ( writeTextile ) where
-import Prelude
 import Control.Monad.State.Strict
 import Data.Char (isSpace)
 import Data.Text (Text)
diff --git a/src/Text/Pandoc/Writers/XWiki.hs b/src/Text/Pandoc/Writers/XWiki.hs
index 84b3c0d87..9295ff43c 100644
--- a/src/Text/Pandoc/Writers/XWiki.hs
+++ b/src/Text/Pandoc/Writers/XWiki.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-
 Copyright (C) 2008-2017 John MacFarlane <jgm@berkeley.edu>
@@ -34,7 +33,6 @@ XWiki Syntax:  <http://www.xwiki.org/xwiki/bin/view/Documentation/UserGuide/Feat
 -}
 
 module Text.Pandoc.Writers.XWiki ( writeXWiki ) where
-import Prelude
 import Control.Monad.Reader (ReaderT, asks, local, runReaderT)
 import qualified Data.Set as Set
 import qualified Data.Text as Text
diff --git a/src/Text/Pandoc/Writers/ZimWiki.hs b/src/Text/Pandoc/Writers/ZimWiki.hs
index fa1e0e4b1..9388ba411 100644
--- a/src/Text/Pandoc/Writers/ZimWiki.hs
+++ b/src/Text/Pandoc/Writers/ZimWiki.hs
@@ -1,4 +1,3 @@
-{-# LANGUAGE NoImplicitPrelude #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE ViewPatterns      #-}
 {- |
@@ -17,7 +16,6 @@ http://zim-wiki.org/manual/Help/Wiki_Syntax.html
 -}
 
 module Text.Pandoc.Writers.ZimWiki ( writeZimWiki ) where
-import Prelude
 import Control.Monad (zipWithM)
 import Control.Monad.State.Strict (StateT, evalStateT, gets, modify)
 import Data.Default (Default (..))