diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 6a7d7062200..fa159da6b1a 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -2168,6 +2168,10 @@ rec {
     inherit (gtkLibs) glib gtk;
   };
 
+  amsn = (import ../applications/networking/instant-messengers/amsn) {
+    inherit fetchurl stdenv which tcl tk x11;
+  };
+
   xchat = (import ../applications/networking/irc/xchat) {
     inherit fetchurl stdenv pkgconfig tcl;
     inherit (gtkLibs) glib gtk;