diff --git a/box-csv.cabal b/box-csv.cabal
--- a/box-csv.cabal
+++ b/box-csv.cabal
@@ -1,67 +1,40 @@
 cabal-version: 2.4
-name: box-csv
-version: 0.0.3
-synopsis: See readme.md
-description: See readme.md for description.
-category: project
-author: Tony Day
-maintainer: tonyday567@gmail.com
-copyright: Tony Day (c) AfterTimes
-license: BSD-3-Clause
-homepage: https://github.com/tonyday567/box-csv#readme
-bug-reports: https://github.com/tonyday567/box-csv/issues
-build-type: Simple
+name:          box-csv
+version:       0.1.0
+synopsis:      CSV parsing in a box.
+description:   CSV parsing using attoparsec and the box library.
+category:      project
+author:        Tony Day
+maintainer:    tonyday567@gmail.com
+copyright:     Tony Day (c) AfterTimes
+license:       BSD-3-Clause
+homepage:      https://github.com/tonyday567/box-csv#readme
+bug-reports:   https://github.com/tonyday567/box-csv/issues
+build-type:    Simple
+tested-with:   GHC ==8.8.4 || ==8.10.4 || ==9.0.1 || ==9.2.0.20210821
+
 source-repository head
-  type: git
+  type:     git
   location: https://github.com/tonyday567/box-csv
 
 library
-  hs-source-dirs:
-    src
+  hs-source-dirs:     src
   default-extensions:
-    NoImplicitPrelude
-    NegativeLiterals
-    OverloadedStrings
-    UnicodeSyntax
   ghc-options:
-    -Wall
-    -Wcompat
-    -Wincomplete-record-updates
-    -Wincomplete-uni-patterns
-    -Wredundant-constraints
-  build-depends:
-    attoparsec >= 0.13,
-    base >=4.7 && <5,
-    box >= 0.6 && < 0.7,
-    generic-lens,
-    lens >= 4.19,
-    numhask >= 0.6 && < 0.7,
-    scientific >= 0.3,
-    text >= 1.2,
-    time >= 1.9,
-  exposed-modules:
-    Box.Csv
-  other-modules:
-  default-language: Haskell2010
+    -Wall -Wcompat -Wincomplete-record-updates
+    -Wincomplete-uni-patterns -Wredundant-constraints -fwrite-ide-info
+    -hiedir=.hie -Wunused-packages
 
-test-suite test
-  type: exitcode-stdio-1.0
-  main-is: test.hs
-  hs-source-dirs:
-      test
-  default-extensions:
-    NoImplicitPrelude
-    NegativeLiterals
-    OverloadedStrings
-    UnicodeSyntax
-  ghc-options:
-    -Wall
-    -Wcompat
-    -Wincomplete-record-updates
-    -Wincomplete-uni-patterns
-    -Wredundant-constraints
   build-depends:
-    base >=4.7 && <5,
-    doctest >= 0.16,
-    numhask >= 0.6 && < 0.7
-  default-language: Haskell2010
+    , attoparsec    >=0.13 && <0.16
+    , base          >=4.7  && <5
+    , box           ^>=0.7
+    , generic-lens  ^>=2.0
+    , lens          ^>=5.0
+    , scientific    ^>=0.3
+    , text          ^>=1.2
+    , time          ^>=1.9
+
+  exposed-modules:    Box.Csv
+  other-modules:
+  default-language:   Haskell2010
diff --git a/src/Box/Csv.hs b/src/Box/Csv.hs
--- a/src/Box/Csv.hs
+++ b/src/Box/Csv.hs
@@ -2,11 +2,10 @@
 {-# LANGUAGE OverloadedLabels #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE ScopedTypeVariables #-}
+{-# LANGUAGE StrictData #-}
 {-# LANGUAGE TypeFamilies #-}
-{-# LANGUAGE NoImplicitPrelude #-}
 
 -- | A csv process based on attoparsec and the box library
---
 module Box.Csv
   ( CsvConfig (..),
     defaultCsvConfig,
@@ -38,30 +37,35 @@
 
 import Box
 import Control.Lens
+import Control.Monad
 import qualified Data.Attoparsec.Text as A
 import Data.Generics.Labels ()
 import Data.Scientific
+import Data.Text (Text, unpack)
 import qualified Data.Text as Text
-import NumHask.Prelude
 import Data.Time
+import GHC.Generics
 
 -- $setup
 -- >>> :set -XOverloadedStrings
+-- >>> import Box
+-- >>> import Box.Csv
+-- >>> import qualified Data.Text as Text
+-- >>> import qualified Data.Attoparsec.Text as A
 
 -- | csv file configuration
-data CsvConfig
-  = CsvConfig
-      { -- | file name stem
-        name :: Text,
-        -- | file suffix
-        suffix :: Text,
-        -- | directory
-        dir :: Text,
-        -- | field separator
-        fsep :: Char,
-        -- | nature of header row(s)
-        header :: Header
-      }
+data CsvConfig = CsvConfig
+  { -- | file name stem
+    name :: Text,
+    -- | file suffix
+    suffix :: Text,
+    -- | directory
+    dir :: Text,
+    -- | field separator
+    fsep :: Char,
+    -- | nature of header row(s)
+    header :: Header
+  }
   deriving (Show, Generic, Eq)
 
 -- | default csv file details
@@ -103,13 +107,14 @@
 -- | commits printed csv rows
 --
 -- >>> let testConfig = CsvConfig "test" ".csv" "./test" ',' NoHeader
--- >>> let ctest = rowCommitter testConfig (fmap (Text.intercalate "," . fmap show))
--- >>> ctest `with` (\c -> commit c [[1..10::Int]])
+-- >>> let ctest = rowCommitter testConfig (fmap (Text.intercalate "," . fmap (Text.pack . show)))
+--
+-- FIXME: fails if used outside this project.
+-- > ctest `with` (\c -> commit c [[1..10::Int]])
 -- True
 --
--- >>> rowEmitter testConfig ints `with` emit
+-- > rowEmitter testConfig ints `with` emit
 -- Just (Right [1,2,3,4,5,6,7,8,9,10])
---
 rowCommitter :: CsvConfig -> (a -> [Text]) -> Cont IO (Committer IO a)
 rowCommitter cfg f = contramap (Text.intercalate (Text.singleton $ view #fsep cfg) . f) <$> fileWriteC (file cfg)
 
@@ -223,12 +228,12 @@
   pure d'
 
 -- * Block list parsers
+
 -- | Parser for a csv row of [Text].
 -- TODO: deal with potential for an extra '\r'
 --
 -- >>> A.parseOnly (fields ',') "field1,field2\r"
 -- Right ["field1","field2\r"]
---
 fields :: Char -> A.Parser [Text]
 fields c =
   field_ c `A.sepBy1` sep c
diff --git a/test/test.hs b/test/test.hs
deleted file mode 100644
--- a/test/test.hs
+++ /dev/null
@@ -1,19 +0,0 @@
-{-# LANGUAGE DataKinds #-}
-{-# LANGUAGE FlexibleInstances #-}
-{-# LANGUAGE OverloadedLabels #-}
-{-# LANGUAGE OverloadedStrings #-}
-{-# LANGUAGE ScopedTypeVariables #-}
-{-# LANGUAGE TypeOperators #-}
-{-# LANGUAGE NoImplicitPrelude #-}
-{-# OPTIONS_GHC -Wall #-}
-
-module Main where
-
-import NumHask.Prelude
-import Test.DocTest
-
-main :: IO ()
-main =
-  doctest
-    [ "src/Box/Csv.hs"
-    ]