anchor.diff:        glfw
         glxinfo
         pcg_c
  +
  +      # Database
  +      postgresql
  +
  +      # Ops
  +      ansible2
       ];
     });
   
  
positive.code:       zsh
        xlibs.xmodmap
        xlibs.xev
        rxvt_unicode
        rxvt_unicode.terminfo
        urxvt_font_size
  
negative.code:       # 'haskellPackages.cabal-install'.
        cabal-install
  
        # We need GHC because it provides the useful 'ghci' REPL; useful for quick
        # calculator math, etc.
        ghc
  
        # Misc userland packages.
        hledger
        hledger-web
  
        auca
        ztile
        ox
  