diff --git a/pkgs/applications/networking/instant-messengers/wire-desktop/default.nix b/pkgs/applications/networking/instant-messengers/wire-desktop/default.nix
index 69b8ae9ee0c..10b7eb7d439 100644
--- a/pkgs/applications/networking/instant-messengers/wire-desktop/default.nix
+++ b/pkgs/applications/networking/instant-messengers/wire-desktop/default.nix
@@ -13,17 +13,19 @@ let
 
   inherit (stdenv.hostPlatform) system;
 
+  throwSystem = throw "Unsupported system: ${system}";
+
   pname = "wire-desktop";
 
   version = {
     "x86_64-linux" = "3.9.2895";
     "x86_64-darwin" = "3.9.2943";
-  }.${system} or "";
+  }.${system} or throwSystem;
 
   sha256 = {
     "x86_64-linux" = "0wrn95m64j4b7ym44h9zawq13kg4m12aixlyyzp56bfyczmjq4a5";
     "x86_64-darwin" = "1y1bzsjmjrj518q29xfx6gg1nhdbaz7y5hzaqrp241az6plp090k";
-  }.${system};
+  }.${system} or throwSystem;
 
   meta = with stdenv.lib; {
     description = "A modern, secure messenger for everyone";