xmonad.hs 컴파일 오류

다양한 레이아웃으로 다양한 작업 공간을 만들려고 하다가 이 모듈을 발견했습니다. https://hackage.haskell.org/package/xmonad-contrib-0.15/docs/XMonad-Layout-PerWorkspace.html

다음 줄을 가져와 XMonad.Layout.PerWorkspace추가 했습니다.xmonad.hs

onWorkspace ["2"] noBorders monocle $  -- layout l1 will be used on workspace "2".
onWorkspace ["9"] smartBorders Full $  -- layout l2 will be used on workspace "6".

존재하다myLayoutHook

-- The layout hook
myLayoutHook = avoidStruts $ mouseResize $ windowArrange $ T.toggleLayouts floats $
               mkToggle (NBFULL ?? NOBORDERS ?? EOT) myDefaultLayout

               onWorkspace ["2"] noBorders monocle $  -- layout l1 will be used on workspace "2".
               onWorkspace ["9"] smartBorders Full $  -- layout l2 will be used on workspace "6".

             where
               -- I've commented out the layouts I don't use.
               myDefaultLayout =     tall
                                 ||| noBorders monocle
                                 ||| floats
                                 ||| grid
                                 ||| smartBorders Full

그런데 재컴파일을 하면 오류가 납니다xmonad

> xmonad --recompile                                                                                                                         
XMonad will use ghc to recompile, because "/home/apoorv/.xmonad/build" does not exist.
Error detected while loading xmonad configuration file: /home/apoorv/.xmonad/xmonad.hs
xmonad.hs:620:14: error: parse error on input ‘where’
    |
620 |              where
    |              ^^^^^
Please check the file for errors.
Warning: Missing charsets in String to FontSet conversion