deepin: add throws related to the removal of deepin

pkgs/top-level/aliases.nix

@@ -104,6 +104,7 @@ mapAliases ({
   deadbeef-mpris2-plugin = deadbeefPlugins.mpris2; # added 2018-02-23
   deadpixi-sam = deadpixi-sam-unstable;
   debian_devscripts = debian-devscripts; # added 2016-03-23
+  deepin = throw "deepin was a work in progress and it has been canceled and removed https://github.com/NixOS/nixpkgs/issues/94870"; # added 2020-08-31
   desktop_file_utils = desktop-file-utils; # added 2018-02-25
   devicemapper = lvm2; # added 2018-04-25
   digikam5 = digikam; # added 2017-02-18
@@ -326,6 +327,7 @@ mapAliases ({
   nagiosPluginsOfficial = monitoring-plugins;
   ncat = nmap;  # added 2016-01-26
   netcat-openbsd = libressl.nc; # added 2018-04-25
+  netease-cloud-music = throw "netease-cloud-music has been removed together with deepin"; # added 2020-08-31
   networkmanager_fortisslvpn = networkmanager-fortisslvpn; # added 2018-02-25
   networkmanager_iodine = networkmanager-iodine; # added 2018-02-25
   networkmanager_l2tp = networkmanager-l2tp; # added 2018-02-25