anchor.diff:  
     pname = "slack";
   
  -  x86_64-darwin-version = "4.10.3";
  -  x86_64-darwin-sha256 = "0r77l57vr603xamich4h4gbdd5vdcj0sjs6yjpymfx9s0f98v8bb";
  +  x86_64-darwin-version = "4.11.1";
  +  x86_64-darwin-sha256 = "0a5rq8zhgdckwxnyjv6nrgpnj682j1rd9yc4nwvsbvpzv15kmd35";
   
  -  x86_64-linux-version = "4.10.3";
  -  x86_64-linux-sha256 = "1gnjj2iyk8cwjajg8h9qpmzx10j4qjxjzciq8csg45qfzwkr3drf";
  +  x86_64-linux-version = "4.11.1";
  +  x86_64-linux-sha256 = "1r43g3xnla5aq38l3mpba8jb1gx9m2b6pr84prsclz27nr0rfm6g";
   
     version = {
       x86_64-darwin = x86_64-darwin-version;
  
positive.code: , libpulseaudio
  , libuuid
  , libxcb
  , mesa
  , nspr
  , nss
  
negative.code:       libpulseaudio
        libuuid
        libxcb
        libxkbcommon
        mesa
        nspr
        nss
  