diff --git a/hledger-lib/Hledger/Data/AccountName.hs b/hledger-lib/Hledger/Data/AccountName.hs
index 2f0ee32be..f264d8980 100644
--- a/hledger-lib/Hledger/Data/AccountName.hs
+++ b/hledger-lib/Hledger/Data/AccountName.hs
@@ -41,6 +41,7 @@ module Hledger.Data.AccountName (
 where
 
 import Data.List
+import Data.List.Extra (nubSort)
 #if !(MIN_VERSION_base(4,11,0))
 import Data.Monoid
 #endif
@@ -110,7 +111,7 @@ accountNameDrop n a
 -- ie these plus all their parent accounts up to the root.
 -- Eg: ["a:b:c","d:e"] -> ["a","a:b","a:b:c","d","d:e"]
 expandAccountNames :: [AccountName] -> [AccountName]
-expandAccountNames as = nub $ sort $ concatMap expandAccountName as
+expandAccountNames as = nubSort $ concatMap expandAccountName as
 
 -- | "a:b:c" -> ["a","a:b","a:b:c"]
 expandAccountName :: AccountName -> [AccountName]
diff --git a/hledger-lib/Hledger/Data/Journal.hs b/hledger-lib/Hledger/Data/Journal.hs
index 8e9b391db..bd54d9955 100644
--- a/hledger-lib/Hledger/Data/Journal.hs
+++ b/hledger-lib/Hledger/Data/Journal.hs
@@ -95,7 +95,7 @@ import Data.Function ((&))
 import Data.Functor.Identity (Identity(..))
 import qualified Data.HashTable.ST.Cuckoo as H
 import Data.List
-import Data.List.Extra (groupSort)
+import Data.List.Extra (groupSort, nubSort)
 import qualified Data.Map as M
 import Data.Maybe
 #if !(MIN_VERSION_base(4,11,0))
@@ -258,7 +258,7 @@ journalPrevTransaction j t = journalTransactionAt j (tindex t - 1)
 
 -- | Unique transaction descriptions used in this journal.
 journalDescriptions :: Journal -> [Text]
-journalDescriptions = nub . sort . map tdescription . jtxns
+journalDescriptions = nubSort . map tdescription . jtxns
 
 -- | All postings from this journal's transactions, in order.
 journalPostings :: Journal -> [Posting]
@@ -275,17 +275,17 @@ journalAccountNamesImplied = expandAccountNames . journalAccountNamesUsed
 
 -- | Sorted unique account names declared by account directives in this journal.
 journalAccountNamesDeclared :: Journal -> [AccountName]
-journalAccountNamesDeclared = nub . sort . map fst . jdeclaredaccounts
+journalAccountNamesDeclared = nubSort . map fst . jdeclaredaccounts
 
 -- | Sorted unique account names declared by account directives or posted to
 -- by transactions in this journal.
 journalAccountNamesDeclaredOrUsed :: Journal -> [AccountName]
-journalAccountNamesDeclaredOrUsed j = nub $ sort $ journalAccountNamesDeclared j ++ journalAccountNamesUsed j
+journalAccountNamesDeclaredOrUsed j = nubSort $ journalAccountNamesDeclared j ++ journalAccountNamesUsed j
 
 -- | Sorted unique account names declared by account directives, or posted to
 -- or implied as parents by transactions in this journal.
 journalAccountNamesDeclaredOrImplied :: Journal -> [AccountName]
-journalAccountNamesDeclaredOrImplied j = nub $ sort $ journalAccountNamesDeclared j ++ journalAccountNamesImplied j
+journalAccountNamesDeclaredOrImplied j = nubSort $ journalAccountNamesDeclared j ++ journalAccountNamesImplied j
 
 -- | Convenience/compatibility alias for journalAccountNamesDeclaredOrImplied.
 journalAccountNames :: Journal -> [AccountName]
diff --git a/hledger-lib/Hledger/Data/Posting.hs b/hledger-lib/Hledger/Data/Posting.hs
index 67af366fc..56fe463d3 100644
--- a/hledger-lib/Hledger/Data/Posting.hs
+++ b/hledger-lib/Hledger/Data/Posting.hs
@@ -69,7 +69,7 @@ module Hledger.Data.Posting (
 where
 
 import Data.Foldable (asum)
-import Data.List
+import Data.List.Extra (nubSort)
 import qualified Data.Map as M
 import Data.Maybe
 import Data.MemoUgly (memo)
@@ -190,7 +190,7 @@ hasBalanceAssignment p = not (hasAmount p) && isJust (pbalanceassertion p)
 
 -- | Sorted unique account names referenced by these postings.
 accountNamesFromPostings :: [Posting] -> [AccountName]
-accountNamesFromPostings = nub . sort . map paccount
+accountNamesFromPostings = nubSort . map paccount
 
 sumPostings :: [Posting] -> MixedAmount
 sumPostings = sumStrict . map pamount
diff --git a/hledger-lib/Hledger/Reports/BudgetReport.hs b/hledger-lib/Hledger/Reports/BudgetReport.hs
index ecb0ee7ad..58d932c88 100644
--- a/hledger-lib/Hledger/Reports/BudgetReport.hs
+++ b/hledger-lib/Hledger/Reports/BudgetReport.hs
@@ -11,6 +11,7 @@ where
 
 import Data.Decimal
 import Data.List
+import Data.List.Extra (nubSort)
 import Data.Maybe
 #if !(MIN_VERSION_base(4,11,0))
 import Data.Monoid ((<>))
@@ -202,7 +203,7 @@ combineBudgetAndActual
   (MultiBalanceReport (budgetperiods, budgetrows, (budgettots, budgetgrandtot, budgetgrandavg)))
   (MultiBalanceReport (actualperiods, actualrows, (actualtots, actualgrandtot, actualgrandavg))) =
   let
-    periods = nub $ sort $ filter (/= nulldatespan) $ budgetperiods ++ actualperiods
+    periods = nubSort $ filter (/= nulldatespan) $ budgetperiods ++ actualperiods
 
     -- first, combine any corresponding budget goals with actual changes
     rows1 =
diff --git a/hledger-lib/Hledger/Reports/MultiBalanceReport.hs b/hledger-lib/Hledger/Reports/MultiBalanceReport.hs
index 1daf85e81..266c4205a 100644
--- a/hledger-lib/Hledger/Reports/MultiBalanceReport.hs
+++ b/hledger-lib/Hledger/Reports/MultiBalanceReport.hs
@@ -24,6 +24,7 @@ where
 import GHC.Generics (Generic)
 import Control.DeepSeq (NFData)
 import Data.List
+import Data.List.Extra (nubSort)
 import qualified Data.Map as M
 import Data.Maybe
 import Data.Ord
@@ -235,7 +236,7 @@ multiBalanceReportWith ropts@ReportOpts{..} q j priceoracle =
           (if tree_ ropts then expandAccountNames else id) $
           nub $ map (clipOrEllipsifyAccountName depth) $
           if empty_ || balancetype_ == HistoricalBalance
-          then nub $ sort $ startaccts ++ allpostedaccts
+          then nubSort $ startaccts ++ allpostedaccts
           else allpostedaccts
         where
           allpostedaccts :: [AccountName] =
diff --git a/hledger-lib/Hledger/Reports/PostingsReport.hs b/hledger-lib/Hledger/Reports/PostingsReport.hs
index 5ac539bcc..8f03a882a 100644
--- a/hledger-lib/Hledger/Reports/PostingsReport.hs
+++ b/hledger-lib/Hledger/Reports/PostingsReport.hs
@@ -23,8 +23,8 @@ module Hledger.Reports.PostingsReport (
 where
 
 import Data.List
+import Data.List.Extra (nubSort)
 import Data.Maybe
-import Data.Ord (comparing)
 -- import Data.Text (Text)
 import qualified Data.Text as T
 import Data.Time.Calendar
@@ -166,7 +166,7 @@ matchedPostingsBeforeAndDuring opts q j (DateSpan mstart mend) =
   where
     beforestartq = dbg1 "beforestartq" $ dateqtype $ DateSpan Nothing mstart
     beforeandduringps =
-      dbg1 "ps5" $ sortBy (comparing sortdate) $                               -- sort postings by date or date2
+      dbg1 "ps5" $ sortOn sortdate $                                           -- sort postings by date or date2
       dbg1 "ps4" $ (if invert_ opts then map negatePostingAmount else id) $    -- with --invert, invert amounts
       dbg1 "ps3" $ map (filterPostingAmount symq) $                            -- remove amount parts which the query's cur: terms would exclude
       dbg1 "ps2" $ (if related_ opts then concatMap relatedPostings else id) $ -- with -r, replace each with its sibling postings
@@ -254,7 +254,7 @@ summarisePostingsInDateSpan (DateSpan b e) wd depth showempty ps
       summaryps | depth > 0 = [summaryp{paccount=a,pamount=balance a} | a <- clippedanames]
                 | otherwise = [summaryp{paccount="...",pamount=sum $ map pamount ps}]
       summarypes = map (, e') $ (if showempty then id else filter (not . isZeroMixedAmount . pamount)) summaryps
-      anames = sort $ nub $ map paccount ps
+      anames = nubSort $ map paccount ps
       -- aggregate balances by account, like ledgerFromJournal, then do depth-clipping
       accts = accountsFromPostings ps
       balance a = maybe nullmixedamt bal $ lookupAccount a accts
diff --git a/hledger-lib/Hledger/Reports/ReportOptions.hs b/hledger-lib/Hledger/Reports/ReportOptions.hs
index b5f13a434..d758b416d 100644
--- a/hledger-lib/Hledger/Reports/ReportOptions.hs
+++ b/hledger-lib/Hledger/Reports/ReportOptions.hs
@@ -46,7 +46,7 @@ where
 
 import Control.Applicative ((<|>))
 import Data.Data (Data)
-import Data.List
+import Data.List.Extra (nubSort)
 import Data.Maybe
 import qualified Data.Text as T
 import Data.Typeable (Typeable)
@@ -337,7 +337,7 @@ simplifyStatuses l
   | length l' >= numstatuses = []
   | otherwise                = l'
   where
-    l' = nub $ sort l
+    l' = nubSort l
     numstatuses = length [minBound .. maxBound :: Status]
 
 -- | Add/remove this status from the status list. Used by hledger-ui.
diff --git a/hledger-lib/Hledger/Reports/TransactionsReport.hs b/hledger-lib/Hledger/Reports/TransactionsReport.hs
index d31eab688..a2994bd0e 100644
--- a/hledger-lib/Hledger/Reports/TransactionsReport.hs
+++ b/hledger-lib/Hledger/Reports/TransactionsReport.hs
@@ -22,6 +22,7 @@ module Hledger.Reports.TransactionsReport (
 where
 
 import Data.List
+import Data.List.Extra (nubSort)
 import Data.Ord
 
 import Hledger.Data
@@ -79,7 +80,7 @@ transactionsReportByCommodity tr =
   [(c, filterTransactionsReportByCommodity c tr) | c <- transactionsReportCommodities tr]
   where
     transactionsReportCommodities (_,items) =
-      nub $ sort $ map acommodity $ concatMap (amounts . triAmount) items
+      nubSort . map acommodity $ concatMap (amounts . triAmount) items
 
 -- Remove transaction report items and item amount (and running
 -- balance amount) components that don't involve the specified
diff --git a/hledger-ui/Hledger/UI/Main.hs b/hledger-ui/Hledger/UI/Main.hs
index 2d1373bb7..62bac3e06 100644
--- a/hledger-ui/Hledger/UI/Main.hs
+++ b/hledger-ui/Hledger/UI/Main.hs
@@ -21,6 +21,7 @@ import Data.Default (def)
 #endif
 -- import Data.Monoid              --
 import Data.List
+import Data.List.Extra (nubSort)
 import Data.Maybe
 -- import Data.Text (Text)
 import qualified Data.Text as T
@@ -205,7 +206,7 @@ runBrickUi uopts@UIOpts{cliopts_=copts@CliOpts{inputopts_=_iopts,reportopts_=rop
       withManager $ \mgr -> do
         dbg1IO "fsnotify using polling ?" $ isPollingManager mgr
         files <- mapM (canonicalizePath . fst) $ jfiles j
-        let directories = nub $ sort $ map takeDirectory files
+        let directories = nubSort $ map takeDirectory files
         dbg1IO "files" files
         dbg1IO "directories to watch" directories
 
diff --git a/hledger-ui/hledger-ui.cabal b/hledger-ui/hledger-ui.cabal
index e6a0919b5..a2617e1a8 100644
--- a/hledger-ui/hledger-ui.cabal
+++ b/hledger-ui/hledger-ui.cabal
@@ -74,6 +74,7 @@ executable hledger-ui
     , containers
     , data-default
     , directory
+    , extra >=1.6.3
     , filepath
     , fsnotify >=0.2.1.2 && <0.4
     , hledger >=1.16.1 && <1.17
diff --git a/hledger-ui/package.yaml b/hledger-ui/package.yaml
index b2876332a..6f280f719 100644
--- a/hledger-ui/package.yaml
+++ b/hledger-ui/package.yaml
@@ -50,6 +50,7 @@ dependencies:
 - containers
 - data-default
 - directory
+- extra >=1.6.3
 - filepath
 - fsnotify >=0.2.1.2 && <0.4
 - microlens >=0.4
diff --git a/hledger-web/Hledger/Web/Widget/AddForm.hs b/hledger-web/Hledger/Web/Widget/AddForm.hs
index 24c775ee8..5309e5d2e 100644
--- a/hledger-web/Hledger/Web/Widget/AddForm.hs
+++ b/hledger-web/Hledger/Web/Widget/AddForm.hs
@@ -13,7 +13,8 @@ module Hledger.Web.Widget.AddForm
 
 import Control.Monad.State.Strict (evalStateT)
 import Data.Bifunctor (first)
-import Data.List (dropWhileEnd, intercalate, nub, sort, unfoldr)
+import Data.List (dropWhileEnd, intercalate, unfoldr)
+import Data.List.Extra (nubSort)
 import Data.Maybe (isJust)
 #if !(MIN_VERSION_base(4,13,0))
 import Data.Semigroup ((<>))
@@ -71,7 +72,7 @@ addForm j today = identifyForm "add" $ \extra -> do
   let (postRes, displayRows) = validatePostings acctRes amtRes
 
   -- bindings used in add-form.hamlet
-  let descriptions = sort $ nub $ tdescription <$> jtxns j
+  let descriptions = nubSort $ tdescription <$> jtxns j
       journals = fst <$> jfiles j
 
   pure (validateTransaction dateRes descRes postRes, $(widgetFile "add-form"))
diff --git a/hledger-web/hledger-web.cabal b/hledger-web/hledger-web.cabal
index 0c58c7d61..42800a4b4 100644
--- a/hledger-web/hledger-web.cabal
+++ b/hledger-web/hledger-web.cabal
@@ -166,6 +166,7 @@ library
     , containers
     , data-default
     , directory
+    , extra >=1.6.3
     , filepath
     , hjsmin
     , hledger >=1.16.1 && <1.17
diff --git a/hledger-web/package.yaml b/hledger-web/package.yaml
index fc2a12c91..c9667754f 100644
--- a/hledger-web/package.yaml
+++ b/hledger-web/package.yaml
@@ -112,6 +112,7 @@ library:
   - data-default
   - Decimal
   - directory
+  - extra >=1.6.3
   - filepath
   - hjsmin
   - http-conduit
diff --git a/hledger/Hledger/Cli/CliOptions.hs b/hledger/Hledger/Cli/CliOptions.hs
index 1b3887227..1de9d4626 100644
--- a/hledger/Hledger/Cli/CliOptions.hs
+++ b/hledger/Hledger/Cli/CliOptions.hs
@@ -75,6 +75,7 @@ import Data.Char
 import Data.Default
 import Data.Functor.Identity (Identity)
 import "base-compat-batteries" Data.List.Compat
+import Data.List.Extra (nubSort)
 import Data.List.Split (splitOneOf)
 import Data.Ord
 import Data.Maybe
@@ -661,7 +662,7 @@ likelyExecutablesInPath :: IO [String]
 likelyExecutablesInPath = do
   pathdirs <- splitOneOf "[:;]" `fmap` getEnvSafe "PATH"
   pathfiles <- concat `fmap` mapM getDirectoryContentsSafe pathdirs
-  return $ nub $ sort pathfiles
+  return $ nubSort pathfiles
   -- exclude directories and files without execute permission.
   -- These will do a stat for each hledger-*, probably ok.
   -- But they need paths, not just filenames
diff --git a/hledger/Hledger/Cli/Commands/Checkdupes.hs b/hledger/Hledger/Cli/Commands/Checkdupes.hs
index ad2ba1017..5a9467b47 100755
--- a/hledger/Hledger/Cli/Commands/Checkdupes.hs
+++ b/hledger/Hledger/Cli/Commands/Checkdupes.hs
@@ -8,6 +8,7 @@ where
 
 import Data.Function
 import Data.List
+import Data.List.Extra (nubSort)
 import qualified Data.Text as T
 import Hledger
 import Hledger.Cli.CliOptions
@@ -28,7 +29,7 @@ accountsNames :: Journal -> [(String, AccountName)]
 accountsNames j = map leafAndAccountName as
   where leafAndAccountName a = (T.unpack $ accountLeafName a, a)
         ps = journalPostings j
-        as = nub $ sort $ map paccount ps
+        as = nubSort $ map paccount ps
 
 checkdupes' :: (Ord k, Eq k) => [(k, v)] -> [(k, [v])]
 checkdupes' l = zip dupLeafs dupAccountNames
diff --git a/hledger/Hledger/Cli/Commands/Commodities.hs b/hledger/Hledger/Cli/Commands/Commodities.hs
index 8d234f03b..d2bb863f7 100644
--- a/hledger/Hledger/Cli/Commands/Commodities.hs
+++ b/hledger/Hledger/Cli/Commands/Commodities.hs
@@ -13,7 +13,7 @@ module Hledger.Cli.Commands.Commodities (
 ) where
 
 import Control.Monad
-import Data.List
+import Data.List.Extra (nubSort)
 import qualified Data.Map as M
 import qualified Data.Text.IO as T
 
@@ -32,5 +32,5 @@ commoditiesmode = hledgerCommandMode
 commodities :: CliOpts -> Journal -> IO ()
 commodities _copts j = do
   let cs = filter (/= "AUTO") $
-           nub $ sort $ M.keys (jcommodities j) ++ M.keys (jinferredcommodities j)
+           nubSort $ M.keys (jcommodities j) ++ M.keys (jinferredcommodities j)
   forM_ cs T.putStrLn
diff --git a/hledger/Hledger/Cli/Commands/Descriptions.hs b/hledger/Hledger/Cli/Commands/Descriptions.hs
index 734cb040f..e5223b37b 100644
--- a/hledger/Hledger/Cli/Commands/Descriptions.hs
+++ b/hledger/Hledger/Cli/Commands/Descriptions.hs
@@ -14,7 +14,7 @@ module Hledger.Cli.Commands.Descriptions (
  ,descriptions
 ) where
 
-import Data.List
+import Data.List.Extra (nubSort)
 import qualified Data.Text.IO as T
 
 import Hledger
@@ -35,6 +35,6 @@ descriptions CliOpts{reportopts_=ropts} j = do
   d <- getCurrentDay
   let q  = queryFromOpts d ropts
       ts = entriesReport ropts q j
-      descriptions = nub $ sort $ map tdescription ts
+      descriptions = nubSort $ map tdescription ts
 
   mapM_ T.putStrLn descriptions
diff --git a/hledger/Hledger/Cli/Commands/Notes.hs b/hledger/Hledger/Cli/Commands/Notes.hs
index d84c5b0a0..dffb7f4fa 100644
--- a/hledger/Hledger/Cli/Commands/Notes.hs
+++ b/hledger/Hledger/Cli/Commands/Notes.hs
@@ -15,7 +15,7 @@ module Hledger.Cli.Commands.Notes (
  ,notes
 ) where
 
-import Data.List
+import Data.List.Extra (nubSort)
 import qualified Data.Text.IO as T
 
 import Hledger
@@ -36,6 +36,6 @@ notes CliOpts{reportopts_=ropts} j = do
   d <- getCurrentDay
   let q  = queryFromOpts d ropts
       ts = entriesReport ropts q j
-      notes = nub $ sort $ map transactionNote ts
+      notes = nubSort $ map transactionNote ts
 
   mapM_ T.putStrLn notes
diff --git a/hledger/Hledger/Cli/Commands/Payees.hs b/hledger/Hledger/Cli/Commands/Payees.hs
index dc783bb99..3e9ec650a 100644
--- a/hledger/Hledger/Cli/Commands/Payees.hs
+++ b/hledger/Hledger/Cli/Commands/Payees.hs
@@ -15,7 +15,7 @@ module Hledger.Cli.Commands.Payees (
  ,payees
 ) where
 
-import Data.List
+import Data.List.Extra (nubSort)
 import qualified Data.Text.IO as T
 
 import Hledger
@@ -36,6 +36,6 @@ payees CliOpts{reportopts_=ropts} j = do
   d <- getCurrentDay
   let q  = queryFromOpts d ropts
       ts = entriesReport ropts q j
-      payees = nub $ sort $ map transactionPayee ts
+      payees = nubSort $ map transactionPayee ts
 
   mapM_ T.putStrLn payees
diff --git a/hledger/Hledger/Cli/Commands/Printunique.hs b/hledger/Hledger/Cli/Commands/Printunique.hs
index d17761c15..a0aba7939 100755
--- a/hledger/Hledger/Cli/Commands/Printunique.hs
+++ b/hledger/Hledger/Cli/Commands/Printunique.hs
@@ -6,7 +6,7 @@ module Hledger.Cli.Commands.Printunique (
 )
 where
 
-import Data.List
+import Data.List.Extra (nubSortOn)
 import Hledger
 import Hledger.Cli.CliOptions
 import Hledger.Cli.Commands.Print
@@ -21,6 +21,6 @@ printuniquemode = hledgerCommandMode
 printunique opts j@Journal{jtxns=ts} = do
   print' opts j{jtxns=uniquify ts}
   where
-    uniquify = nubBy (\t1 t2 -> thingToCompare t1 == thingToCompare t2) . sortOn thingToCompare
+    uniquify = nubSortOn thingToCompare
     thingToCompare = tdescription
     -- thingToCompare = tdate
diff --git a/hledger/Hledger/Cli/Commands/Stats.hs b/hledger/Hledger/Cli/Commands/Stats.hs
index d61672eef..b4c16c187 100644
--- a/hledger/Hledger/Cli/Commands/Stats.hs
+++ b/hledger/Hledger/Cli/Commands/Stats.hs
@@ -14,6 +14,7 @@ module Hledger.Cli.Commands.Stats (
 where
 
 import Data.List
+import Data.List.Extra (nubSort)
 import Data.Maybe
 import Data.Ord
 import Data.HashSet (size, fromList)
@@ -108,4 +109,4 @@ showLedgerStats l today span =
              acctdepth | null as = 0
                        | otherwise = maximum $ map accountNameLevel as
              mktprices = jpricedirectives j
-             mktpricecommodities = nub $ sort $ map pdcommodity mktprices
+             mktpricecommodities = nubSort $ map pdcommodity mktprices