diff --git a/packages/thunderbird-mold/package.nix b/packages/thunderbird-mold/package.nix
new file mode 100644
index 0000000..800e67d
--- /dev/null
+++ b/packages/thunderbird-mold/package.nix
@@ -0,0 +1,9 @@
+{
+  mold,
+  thunderbird-latest-unwrapped,
+}:
+thunderbird-latest-unwrapped.overrideAttrs (old: {
+  nativeBuildInputs = (old.nativeBuildInputs or []) ++ [ mold ];
+
+  configureFlags = (old.configureFlags or []) ++ [ "--enable-linker=mold" ];
+})