anchor.diff:        xlibs.xmodmap
         xlibs.xev
         xdotool
  -      alacritty
  +      xorg.xdpyinfo
  +      xorg.xkill
  +      xcompmgr
  +      # TODO: Remove from HEAD when nixos.alacritty is >= 0.5.0.
  +      HEAD.alacritty
         tmux
   
  -      emacs
  +      # TODO: Remove from HEAD when nixos.emacs is >= 27.1.
  +      HEAD.emacs
         sqlite # for org-roam in emacs
         graphviz # for org-roam-graph in emacs
   
  
positive.code:       xscreensaver
        pavucontrol
        woeusb
      ];
    });
  
  
negative.code:       hlint
        shellcheck
        pandoc
        dhall
        gitAndTools.git-annex
      ];
    });
  