title: XMonad stuck launching xterm
body: <p>In XMonad I have the default config file. I've made some small changes but I'm trying to get alacritty to launch instead of xterm.  I've tried changing the &quot;myTerminal&quot; to = alacritty and that didn't work.  Then I tried to spawn alacritty and it still spawned xterm.</p>
  <p>So I added in a keybinding:</p>
  <pre><code>, ((modm,               xK_e     ), spawn &quot;alacritty&quot;)
  </code></pre>
  <p>I still wasn't able to launch alacritty. However, I can launch alacritty from dmenu.</p>
  <pre><code>
  import XMonad
  import Data.Monoid
  import System.Exit
  import XMonad.Hooks.DynamicLog
  import XMonad.Hooks.ManageDocks
  import XMonad.Util.Run(spawnPipe)
  import XMonad.Util.EZConfig(additionalKeys)
  import XMonad.Util.SpawnOnce
  import System.IO
  import qualified XMonad.StackSet as W
  import qualified Data.Map        as M
  
  main = do
      xmproc &lt;- spawnPipe &quot;xmobar&quot;
      xmonad $ docks defaultConfig
          { manageHook = myManageHook &lt;+&gt; manageHook defaultConfig -- make sure to include myManageHook definition from above
          , layoutHook = avoidStruts  $  layoutHook defaultConfig
          , logHook = dynamicLogWithPP xmobarPP
                          { ppOutput = hPutStrLn xmproc
                          , ppTitle = xmobarColor &quot;green&quot; &quot;&quot; . shorten 50
                          }
          , modMask = mod4Mask     -- Rebind Mod to the Windows key
          } 
  
  -- The preferred terminal program, which is used in a binding below and by
  -- certain contrib modules.
  --
  myTerminal      = &quot;alacritty&quot;
  
  -- Whether focus follows the mouse pointer.
  myFocusFollowsMouse :: Bool
  myFocusFollowsMouse = True
  
  -- Whether clicking on a window to focus also passes the click to the window
  myClickJustFocuses :: Bool
  myClickJustFocuses = False
  
  -- Width of the window border in pixels.
  --
  myBorderWidth   = 2
  
  -- modMask lets you specify which modkey you want to use. The default
  -- is mod1Mask (&quot;left alt&quot;).  You may also consider using mod3Mask
  -- (&quot;right alt&quot;), which does not conflict with emacs keybindings. The
  -- &quot;windows key&quot; is usually mod4Mask.
  --
  myModMask       = mod4Mask
  
  -- The default number of workspaces (virtual screens) and their names.
  -- By default we use numeric strings, but any string may be used as a
  -- workspace name. The number of workspaces is determined by the length
  -- of this list.
  --
  -- A tagging example:
  --
  -- &gt; workspaces = [&quot;web&quot;, &quot;irc&quot;, &quot;code&quot; ] ++ map show [4..9]
  --
  myWorkspaces    = [&quot;1&quot;,&quot;2&quot;,&quot;3&quot;,&quot;4&quot;,&quot;5&quot;,&quot;6&quot;,&quot;7&quot;,&quot;8&quot;,&quot;9&quot;]
  
  -- Border colors for unfocused and focused windows, respectively.
  --
  myNormalBorderColor  = &quot;#dddddd&quot;
  myFocusedBorderColor = &quot;#ff0000&quot;
  
  ------------------------------------------------------------------------
  -- Key bindings. Add, modify or remove key bindings here.
  --
  myKeys conf@(XConfig {XMonad.modMask = modm}) = M.fromList $
  
      -- launch a terminal
      [ ((modm .|. shiftMask, xK_Return), spawn $ XMonad.terminal conf)
  
      -- launch dmenu
      , ((modm,               xK_p     ), spawn &quot;dmenu_run&quot;)
  
      -- launch gmrun
      , ((modm .|. shiftMask, xK_p     ), spawn &quot;gmrun&quot;)
  
      -- close focused window
      , ((modm .|. shiftMask, xK_c     ), kill)
  
       -- Rotate through the available layout algorithms
      , ((modm,               xK_space ), sendMessage NextLayout)
  
      --  Reset the layouts on the current workspace to default
      , ((modm .|. shiftMask, xK_space ), setLayout $ XMonad.layoutHook conf)
  
      -- Resize viewed windows to the correct size
      , ((modm,               xK_n     ), refresh)
  
      -- Move focus to the next window
      , ((modm,               xK_Tab   ), windows W.focusDown)
  
      -- Move focus to the next window
      , ((modm,               xK_j     ), windows W.focusDown)
  
      -- Move focus to the previous window
      , ((modm,               xK_k     ), windows W.focusUp  )
  
      -- Move focus to the master window
      , ((modm,               xK_m     ), windows W.focusMaster  )
  
      -- Swap the focused window and the master window
      , ((modm,               xK_Return), windows W.swapMaster)
  
      -- Swap the focused window with the next window
      , ((modm .|. shiftMask, xK_j     ), windows W.swapDown  )
  
      -- Swap the focused window with the previous window
      , ((modm .|. shiftMask, xK_k     ), windows W.swapUp    )
  
      -- Shrink the master area
      , ((modm,               xK_h     ), sendMessage Shrink)
  
      -- Expand the master area
      , ((modm,               xK_l     ), sendMessage Expand)
  
      -- Push window back into tiling
      , ((modm,               xK_t     ), withFocused $ windows . W.sink)
  
      -- Increment the number of windows in the master area
      , ((modm              , xK_comma ), sendMessage (IncMasterN 1))
  
      -- Deincrement the number of windows in the master area
      , ((modm              , xK_period), sendMessage (IncMasterN (-1)))
  
      -- Toggle the status bar gap
      -- Use this binding with avoidStruts from Hooks.ManageDocks.
      -- See also the statusBar function from Hooks.DynamicLog.
      --
      -- , ((modm              , xK_b     ), sendMessage ToggleStruts)
  
      -- Quit xmonad
      , ((modm .|. shiftMask, xK_q     ), io (exitWith ExitSuccess))
  
      -- Restart xmonad
      , ((modm              , xK_q     ), spawn &quot;xmonad --recompile; xmonad --restart&quot;)
  
      -- Run xmessage with a summary of the default keybindings (useful for beginners)
      , ((modm .|. shiftMask, xK_slash ), spawn (&quot;echo \&quot;&quot; ++ help ++ &quot;\&quot; | xmessage -file -&quot;))
      ]
      ++
  
      --
      -- mod-[1..9], Switch to workspace N
      -- mod-shift-[1..9], Move client to workspace N
      --
      [((m .|. modm, k), windows $ f i)
          | (i, k) &lt;- zip (XMonad.workspaces conf) [xK_1 .. xK_9]
          , (f, m) &lt;- [(W.greedyView, 0), (W.shift, shiftMask)]]
      ++
  
      --
      -- mod-{w,e,r}, Switch to physical/Xinerama screens 1, 2, or 3
      -- mod-shift-{w,e,r}, Move client to screen 1, 2, or 3
      --
      [((m .|. modm, key), screenWorkspace sc &gt;&gt;= flip whenJust (windows . f))
          | (key, sc) &lt;- zip [xK_w, xK_e, xK_r] [0..]
          , (f, m) &lt;- [(W.view, 0), (W.shift, shiftMask)]]
  
  
  ------------------------------------------------------------------------
  -- Mouse bindings: default actions bound to mouse events
  --
  myMouseBindings (XConfig {XMonad.modMask = modm}) = M.fromList $
  
      -- mod-button1, Set the window to floating mode and move by dragging
      [ ((modm, button1), (\w -&gt; focus w &gt;&gt; mouseMoveWindow w
                                         &gt;&gt; windows W.shiftMaster))
  
      -- mod-button2, Raise the window to the top of the stack
      , ((modm, button2), (\w -&gt; focus w &gt;&gt; windows W.shiftMaster))
  
      -- mod-button3, Set the window to floating mode and resize by dragging
      , ((modm, button3), (\w -&gt; focus w &gt;&gt; mouseResizeWindow w
                                         &gt;&gt; windows W.shiftMaster))
  
      -- you may also bind events to the mouse scroll wheel (button4 and button5)
      ]
  
  ------------------------------------------------------------------------
  -- Layouts:
  
  -- You can specify and transform your layouts by modifying these values.
  -- If you change layout bindings be sure to use 'mod-shift-space' after
  -- restarting (with 'mod-q') to reset your layout state to the new
  -- defaults, as xmonad preserves your old layout settings by default.
  --
  -- The available layouts.  Note that each layout is separated by |||,
  -- which denotes layout choice.
  --
  myLayout = tiled ||| Mirror tiled ||| Full
    where
       -- default tiling algorithm partitions the screen into two panes
       tiled   = Tall nmaster delta ratio
  
       -- The default number of windows in the master pane
       nmaster = 1
  
       -- Default proportion of screen occupied by master pane
       ratio   = 1/2
  
       -- Percent of screen to increment by when resizing panes
       delta   = 3/100
  
  ------------------------------------------------------------------------
  -- Window rules:
  
  -- Execute arbitrary actions and WindowSet manipulations when managing
  -- a new window. You can use this to, for example, always float a
  -- particular program, or have a client always appear on a particular
  -- workspace.
  --
  -- To find the property name associated with a program, use
  -- &gt; xprop | grep WM_CLASS
  -- and click on the client you're interested in.
  --
  -- To match on the WM_NAME, you can use 'title' in the same way that
  -- 'className' and 'resource' are used below.
  --
  myManageHook = composeAll
      [ className =? &quot;MPlayer&quot;        --&gt; doFloat
      , className =? &quot;Gimp&quot;           --&gt; doFloat
      , resource  =? &quot;desktop_window&quot; --&gt; doIgnore
      , resource  =? &quot;kdesktop&quot;       --&gt; doIgnore ]
  
  ------------------------------------------------------------------------
  -- Event handling
  
  -- * EwmhDesktops users should change this to ewmhDesktopsEventHook
  --
  -- Defines a custom handler function for X Events. The function should
  -- return (All True) if the default handler is to be run afterwards. To
  -- combine event hooks use mappend or mconcat from Data.Monoid.
  --
  myEventHook = mempty
  
  ------------------------------------------------------------------------
  -- Status bars and logging
  
  -- Perform an arbitrary action on each internal state change or X event.
  -- See the 'XMonad.Hooks.DynamicLog' extension for examples.
  --
  myLogHook = return ()
  
  ------------------------------------------------------------------------
  -- Startup hook
  
  -- Perform an arbitrary action each time xmonad starts or is restarted
  -- with mod-q.  Used by, e.g., XMonad.Layout.PerWorkspace to initialize
  -- per-workspace layout choices.
  --
  -- By default, do nothing.
  myStartupHook = return ()
  
  ------------------------------------------------------------------------
  -- Now run xmonad with all the defaults we set up.
  
  -- Run xmonad with the settings you specify. No need to modify this.
  --
  --main = xmonad defaults
  
  -- A structure containing your configuration settings, overriding
  -- fields in the default config. Any you don't override, will
  -- use the defaults defined in xmonad/XMonad/Config.hs
  --
  -- No need to modify this.
  --
  defaults = def {
        -- simple stuff
          terminal           = myTerminal,
          focusFollowsMouse  = myFocusFollowsMouse,
          clickJustFocuses   = myClickJustFocuses,
          borderWidth        = myBorderWidth,
          modMask            = myModMask,
          workspaces         = myWorkspaces,
          normalBorderColor  = myNormalBorderColor,
          focusedBorderColor = myFocusedBorderColor,
  
        -- key bindings
          keys               = myKeys,
          mouseBindings      = myMouseBindings,
  
        -- hooks, layouts
          layoutHook         = myLayout,
          manageHook         = myManageHook,
          handleEventHook    = myEventHook,
          logHook            = myLogHook,
          startupHook        = myStartupHook
      }
  
  
  </code></pre>
  <p>That's my xmonad.hs file.</p>