diff --git a/pkgs/applications/networking/mailreaders/thunderbird/default.nix b/pkgs/applications/networking/mailreaders/thunderbird/default.nix
index a1fc52337ed..c0d87ee5a03 100644
--- a/pkgs/applications/networking/mailreaders/thunderbird/default.nix
+++ b/pkgs/applications/networking/mailreaders/thunderbird/default.nix
@@ -22,7 +22,7 @@ stdenv.mkDerivation {
     sha1 = "ccc5f2e155364948945abf6fd27bebeb4d797aa8";
   };
 
-  enableParallelBuilding = true;
+  enableParallelBuilding = false;
 
   buildInputs =
     [ pkgconfig perl python zip unzip bzip2 gtk dbus_glib alsaLib libIDL nspr