diff --git a/pkgs/applications/networking/mailreaders/thunderbird/builder.sh b/pkgs/applications/networking/mailreaders/thunderbird-1.x/builder.sh
similarity index 100%
rename from pkgs/applications/networking/mailreaders/thunderbird/builder.sh
rename to pkgs/applications/networking/mailreaders/thunderbird-1.x/builder.sh
diff --git a/pkgs/applications/networking/mailreaders/thunderbird/default.nix b/pkgs/applications/networking/mailreaders/thunderbird-1.x/default.nix
similarity index 100%
rename from pkgs/applications/networking/mailreaders/thunderbird/default.nix
rename to pkgs/applications/networking/mailreaders/thunderbird-1.x/default.nix
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 027ac21c6c5..2ac04cadf31 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -3083,7 +3083,9 @@ rec {
     gpgSupport = true;
   };
 
-  thunderbird = import ../applications/networking/mailreaders/thunderbird {
+  thunderbird = thunderbird2;
+
+  thunderbird1 = import ../applications/networking/mailreaders/thunderbird-1.x {
     inherit fetchurl stdenv pkgconfig perl zip libjpeg libpng zlib cairo;
     inherit (gtkLibs) gtk;
     inherit (gnome) libIDL;