diff --git a/hledger-ui/Hledger/UI/AccountsScreen.hs b/hledger-ui/Hledger/UI/AccountsScreen.hs
index ba85f6720..d07970aa5 100644
--- a/hledger-ui/Hledger/UI/AccountsScreen.hs
+++ b/hledger-ui/Hledger/UI/AccountsScreen.hs
@@ -29,7 +29,7 @@ import System.FilePath (takeFileName)
 import Text.DocLayout (realLength)
 
 import Hledger
-import Hledger.Cli hiding (progname,prognameandversion)
+import Hledger.Cli hiding (mode, progname, prognameandversion)
 import Hledger.UI.UIOptions
 import Hledger.UI.UITypes
 import Hledger.UI.UIState
@@ -259,8 +259,8 @@ asHandle ev = do
               where s = chomp $ unlines $ map strip $ getEditContents ed
             VtyEvent (EvKey (KChar 'l') [MCtrl]) -> redraw
             VtyEvent (EvKey (KChar 'z') [MCtrl]) -> suspend ui
-            VtyEvent ev -> do
-              ed' <- nestEventM' ed $ handleEditorEvent (VtyEvent ev)
+            VtyEvent e -> do
+              ed' <- nestEventM' ed $ handleEditorEvent (VtyEvent e)
               put' ui{aMode=Minibuffer "filter" ed'}
             AppEvent _  -> return ()
             MouseDown{} -> return ()
@@ -357,18 +357,18 @@ asHandle ev = do
 
             -- if page down or end leads to a blank padding item, stop at last non-blank
             VtyEvent e@(EvKey k           []) | k `elem` [KPageDown, KEnd] -> do
-              list <- nestEventM' _asList $ handleListEvent e
-              if isBlankElement $ listSelectedElement list
+              l <- nestEventM' _asList $ handleListEvent e
+              if isBlankElement $ listSelectedElement l
               then do
-                let list' = listMoveTo lastnonblankidx list
-                scrollSelectionToMiddle list'
-                put' ui{aScreen=scr{_asList=list'}}
+                let l' = listMoveTo lastnonblankidx l
+                scrollSelectionToMiddle l'
+                put' ui{aScreen=scr{_asList=l'}}
               else
-                put' ui{aScreen=scr{_asList=list}}
+                put' ui{aScreen=scr{_asList=l}}
 
             -- fall through to the list's event handler (handles up/down)
-            VtyEvent ev -> do
-              list' <- nestEventM' _asList $ handleListEvent (normaliseMovementKeys ev)
+            VtyEvent e -> do
+              list' <- nestEventM' _asList $ handleListEvent (normaliseMovementKeys e)
               put' ui{aScreen=scr & asList .~ list' & asSelectedAccount .~ selacct }
 
             MouseDown{} -> return ()
@@ -384,7 +384,7 @@ asEnterRegister d selacct ui = do
     regscr = rsSetAccount selacct isdepthclipped registerScreen
       where
         isdepthclipped = case getDepth ui of
-                          Just d  -> accountNameLevel selacct >= d
+                          Just de -> accountNameLevel selacct >= de
                           Nothing -> False
   rsCenterSelection (screenEnter d regscr ui) >>= put'
 
diff --git a/hledger-ui/Hledger/UI/ErrorScreen.hs b/hledger-ui/Hledger/UI/ErrorScreen.hs
index 620cfea8c..a7d61b6df 100644
--- a/hledger-ui/Hledger/UI/ErrorScreen.hs
+++ b/hledger-ui/Hledger/UI/ErrorScreen.hs
@@ -24,7 +24,7 @@ import Lens.Micro ((^.))
 import Text.Megaparsec
 import Text.Megaparsec.Char
 
-import Hledger.Cli hiding (progname,prognameandversion)
+import Hledger.Cli hiding (mode, progname,prognameandversion)
 import Hledger.UI.UIOptions
 import Hledger.UI.UITypes
 import Hledger.UI.UIState
@@ -101,7 +101,7 @@ esHandle ev = do
             VtyEvent (EvKey (KChar 'E') []) -> suspendAndResume $ void (runEditor pos f) >> uiReloadJournalIfChanged copts d j (popScreen ui)
               where
                 (pos,f) = case parsewithString hledgerparseerrorpositionp esError of
-                            Right (f,l,c) -> (Just (l, Just c),f)
+                            Right (f',l,c) -> (Just (l, Just c),f')
                             Left  _       -> (endPosition, journalFilePath j)
             e | e `elem` [VtyEvent (EvKey (KChar 'g') []), AppEvent FileChange] ->
               liftIO (uiReloadJournal copts d (popScreen ui)) >>= put' . uiCheckBalanceAssertions d
diff --git a/hledger-ui/Hledger/UI/Main.hs b/hledger-ui/Hledger/UI/Main.hs
index 5539fb4be..77e37c465 100644
--- a/hledger-ui/Hledger/UI/Main.hs
+++ b/hledger-ui/Hledger/UI/Main.hs
@@ -166,8 +166,8 @@ runBrickUi uopts@UIOpts{uoCliOpts=copts@CliOpts{inputopts_=_iopts,reportspec_=rs
         appStartEvent   = return ()
       , appAttrMap      = const $ fromMaybe defaultTheme $ getTheme =<< uoTheme uopts'
       , appChooseCursor = showFirstCursor
-      , appHandleEvent  = \ev -> do ui <- get; sHandle (aScreen ui) ev
-      , appDraw         = \ui -> sDraw (aScreen ui) ui
+      , appHandleEvent  = \ev -> do ui' <- get; sHandle (aScreen ui') ev
+      , appDraw         = \ui' -> sDraw (aScreen ui') ui'
       }
 
   -- print (length (show ui)) >> exitSuccess  -- show any debug output to this point & quit
diff --git a/hledger-ui/Hledger/UI/RegisterScreen.hs b/hledger-ui/Hledger/UI/RegisterScreen.hs
index a4b057147..641905fe5 100644
--- a/hledger-ui/Hledger/UI/RegisterScreen.hs
+++ b/hledger-ui/Hledger/UI/RegisterScreen.hs
@@ -31,7 +31,7 @@ import System.Console.ANSI
 
 
 import Hledger
-import Hledger.Cli hiding (progname,prognameandversion)
+import Hledger.Cli hiding (mode, progname,prognameandversion)
 import Hledger.UI.UIOptions
 -- import Hledger.UI.Theme
 import Hledger.UI.UITypes
@@ -284,7 +284,7 @@ rsHandle ev = do
   dlogUiTraceM "rsHandle 1"
   case ui0 of
     ui@UIState{
-      aScreen=s@RegisterScreen{..}
+      aScreen=scr@RegisterScreen{..}
       ,aopts=UIOpts{uoCliOpts=copts}
       ,ajournal=j
       ,aMode=mode
@@ -307,8 +307,8 @@ rsHandle ev = do
             -- VtyEvent (EvKey (KChar '/') []) -> put' $ regenerateScreens j d $ showMinibuffer ui
             VtyEvent (EvKey (KChar 'l') [MCtrl]) -> redraw
             VtyEvent (EvKey (KChar 'z') [MCtrl]) -> suspend ui
-            VtyEvent ev -> do
-              ed' <- nestEventM' ed $ handleEditorEvent (VtyEvent ev)
+            VtyEvent e -> do
+              ed' <- nestEventM' ed $ handleEditorEvent (VtyEvent e)
               put' ui{aMode=Minibuffer "filter" ed'}
             AppEvent _  -> return ()
             MouseDown{} -> return ()
@@ -341,7 +341,7 @@ rsHandle ev = do
                 (pos,f) = case listSelectedElement rsList of
                             Nothing -> (endPosition, journalFilePath j)
                             Just (_, RegisterScreenItem{
-                              rsItemTransaction=Transaction{tsourcepos=(SourcePos f l c,_)}}) -> (Just (unPos l, Just $ unPos c),f)
+                              rsItemTransaction=Transaction{tsourcepos=(SourcePos f' l c,_)}}) -> (Just (unPos l, Just $ unPos c),f')
 
             -- display mode/query toggles
             VtyEvent (EvKey (KChar 'B') []) -> rsCenterSelection (regenerateScreens j d $ toggleConversionOp ui) >>= put'
@@ -381,7 +381,7 @@ rsHandle ev = do
             -- MouseDown is sometimes duplicated, https://github.com/jtdaugherty/brick/issues/347
             -- just use it to move the selection
             MouseDown _n BLeft _mods Location{loc=(_x,y)} | not $ (=="") clickeddate -> do
-              put' $ ui{aScreen=s{rsList=listMoveTo y rsList}}
+              put' $ ui{aScreen=scr{rsList=listMoveTo y rsList}}
               where clickeddate = maybe "" rsItemDate $ listElements rsList !? y
             -- and on MouseUp, enter the subscreen
             MouseUp _n (Just BLeft) Location{loc=(_x,y)} | not $ (=="") clickeddate -> do
@@ -398,24 +398,24 @@ rsHandle ev = do
             MouseDown name btn _mods _loc | btn `elem` [BScrollUp, BScrollDown] -> do
               let scrollamt = if btn==BScrollUp then -1 else 1
               list' <- nestEventM' rsList $ listScrollPushingSelection name (rsListSize rsList) scrollamt
-              put' ui{aScreen=s{rsList=list'}}
+              put' ui{aScreen=scr{rsList=list'}}
 
             -- if page down or end leads to a blank padding item, stop at last non-blank
             VtyEvent e@(EvKey k           []) | k `elem` [KPageDown, KEnd] -> do
-              list <- nestEventM' rsList $ handleListEvent e
-              if isBlankElement $ listSelectedElement list
+              l <- nestEventM' rsList $ handleListEvent e
+              if isBlankElement $ listSelectedElement l
               then do
-                let list' = listMoveTo lastnonblankidx list
-                scrollSelectionToMiddle list'
-                put' ui{aScreen=s{rsList=list'}}
+                let l' = listMoveTo lastnonblankidx l
+                scrollSelectionToMiddle l'
+                put' ui{aScreen=scr{rsList=l'}}
               else
-                put' ui{aScreen=s{rsList=list}}
+                put' ui{aScreen=scr{rsList=l}}
 
             -- fall through to the list's event handler (handles other [pg]up/down events)
-            VtyEvent ev -> do
-              let ev' = normaliseMovementKeys ev
-              newitems <- nestEventM' rsList $ handleListEvent ev'
-              put' ui{aScreen=s{rsList=newitems}}
+            VtyEvent e -> do
+              let e' = normaliseMovementKeys e
+              newitems <- nestEventM' rsList $ handleListEvent e'
+              put' ui{aScreen=scr{rsList=newitems}}
 
             MouseDown{}       -> return ()
             MouseUp{}         -> return ()
diff --git a/hledger-ui/Hledger/UI/TransactionScreen.hs b/hledger-ui/Hledger/UI/TransactionScreen.hs
index 1ccba5d79..53c690b22 100644
--- a/hledger-ui/Hledger/UI/TransactionScreen.hs
+++ b/hledger-ui/Hledger/UI/TransactionScreen.hs
@@ -22,7 +22,7 @@ import Brick
 import Brick.Widgets.List (listElementsL, listMoveTo, listSelectedElement)
 
 import Hledger
-import Hledger.Cli hiding (progname,prognameandversion)
+import Hledger.Cli hiding (mode, prices, progname,prognameandversion)
 import Hledger.UI.UIOptions
 -- import Hledger.UI.Theme
 import Hledger.UI.UITypes
@@ -170,7 +170,7 @@ tsHandle ev = do
             VtyEvent (EvKey (KChar 'E') []) -> suspendAndResume $ void (runEditor pos f) >> uiReloadJournalIfChanged copts d j ui
               where
                 (pos,f) = case tsourcepos t of
-                            (SourcePos f l1 c1,_) -> (Just (unPos l1, Just $ unPos c1),f)
+                            (SourcePos f' l1 c1,_) -> (Just (unPos l1, Just $ unPos c1),f')
             AppEvent (DateChange old _) | isStandardPeriod p && p `periodContainsDate` old ->
               put' $ regenerateScreens j d $ setReportPeriod (DayPeriod d) ui
               where
diff --git a/hledger-ui/Hledger/UI/UIState.hs b/hledger-ui/Hledger/UI/UIState.hs
index e2dcac1e3..a19971fc9 100644
--- a/hledger-ui/Hledger/UI/UIState.hs
+++ b/hledger-ui/Hledger/UI/UIState.hs
@@ -286,11 +286,11 @@ regenerateScreens j d ui@UIState{aScreen=s,aPrevScreens=ss} =
   -- remove all the screens from the appstate and then add them back
   -- one at a time, regenerating as we go.
   let
-    first:rest = reverse $ s:ss :: [Screen]
-    ui0 = ui{ajournal=j, aScreen=first, aPrevScreens=[]} :: UIState
+    frst:rest = reverse $ s:ss :: [Screen]
+    ui0 = ui{ajournal=j, aScreen=frst, aPrevScreens=[]} :: UIState
 
-    ui1 = (sInit first) d False ui0 :: UIState
-    ui2 = foldl' (\ui s -> (sInit s) d False $ pushScreen s ui) ui1 rest :: UIState
+    ui1 = (sInit frst) d False ui0 :: UIState
+    ui2 = foldl' (\ui' s' -> (sInit s') d False $ pushScreen s' ui') ui1 rest :: UIState
   in
     ui2
 
diff --git a/hledger-ui/Hledger/UI/UIUtils.hs b/hledger-ui/Hledger/UI/UIUtils.hs
index b908b95f4..a188916d4 100644
--- a/hledger-ui/Hledger/UI/UIUtils.hs
+++ b/hledger-ui/Hledger/UI/UIUtils.hs
@@ -312,8 +312,8 @@ topBottomBorderWithLabels toplabel bottomlabel body =
 -- XXX Should reduce the available size visible to inner widget, but doesn't seem to (cf rsDraw2).
 margin :: Int -> Int -> Maybe Color -> Widget Name -> Widget Name
 margin h v mcolour w = Widget Greedy Greedy $ do
-    c <- getContext
-    let w' = vLimit (c^.availHeightL - v*2) $ hLimit (c^.availWidthL - h*2) w
+    ctx <- getContext
+    let w' = vLimit (ctx^.availHeightL - v*2) $ hLimit (ctx^.availWidthL - h*2) w
         attr = maybe currentAttr (\c -> c `on` c) mcolour
     render $
       withBorderAttr attr $
@@ -375,8 +375,8 @@ normaliseMovementKeys ev
 -- and forecast transactions (generated by --forecast), if the given forecast DateSpan is Nothing,
 -- and include them otherwise.
 reportSpecSetFutureAndForecast :: Day -> Maybe DateSpan -> ReportSpec -> ReportSpec
-reportSpecSetFutureAndForecast d forecast rspec =
-    rspec{_rsQuery=simplifyQuery $ And [_rsQuery rspec, periodq, excludeforecastq forecast]}
+reportSpecSetFutureAndForecast d fcast rspec =
+    rspec{_rsQuery=simplifyQuery $ And [_rsQuery rspec, periodq, excludeforecastq fcast]}
   where
     periodq = Date . periodAsDateSpan . period_ $ _rsReportOpts rspec
     -- Except in forecast mode, exclude future/forecast transactions.
diff --git a/hledger-ui/package.yaml b/hledger-ui/package.yaml
index f2e136af3..b25220367 100644
--- a/hledger-ui/package.yaml
+++ b/hledger-ui/package.yaml
@@ -44,7 +44,6 @@ ghc-options:
 - -Wall
 - -Wno-incomplete-uni-patterns
 - -Wno-missing-signatures
-- -Wno-name-shadowing
 - -Wno-orphans
 - -Wno-type-defaults
 - -Wno-unused-do-bind
diff --git a/hledger/Hledger/Cli/Main.hs b/hledger/Hledger/Cli/Main.hs
index b8e42d71e..51fb15cc7 100644
--- a/hledger/Hledger/Cli/Main.hs
+++ b/hledger/Hledger/Cli/Main.hs
@@ -144,8 +144,8 @@ main = do
     printUsage           = putStr $ showModeUsage $ mainmode addons
     badCommandError      = error' ("command "++rawcmd++" is not recognized, run with no command to see a list") >> exitFailure  -- PARTIAL:
     hasHelpFlag args     = any (`elem` args) ["-h","--help"]
-    hasManFlag args      = any (`elem` args) ["--man"]
-    hasInfoFlag args     = any (`elem` args) ["--info"]
+    hasManFlag args      = (`elem` args) "--man"
+    hasInfoFlag args     = (`elem` args) "--info"
     f `orShowHelp` mode
       | hasHelpFlag args = putStr $ showModeUsage mode
       | hasInfoFlag args = runInfoForTopic "hledger" (headMay $ modeNames mode)