diff --git a/pkgs/top-level/release.nix b/pkgs/top-level/release.nix
index 09be02ba915b..d4a50a323710 100644
--- a/pkgs/top-level/release.nix
+++ b/pkgs/top-level/release.nix
@@ -301,8 +301,6 @@ with (import ./release-lib.nix);
   texLiveBeamer = linux;
   texLiveExtra = linux;
   texinfo = all;
-  thunderbird2 = linux;
-  thunderbird3 = linux;
   tightvnc = linux;
   time = linux;
   tinycc = ["i686-linux"];