diff --git a/entropy/nixos/configuration.nix b/entropy/nixos/configuration.nix
index a8aa932..d39ed0c 100644
--- a/entropy/nixos/configuration.nix
+++ b/entropy/nixos/configuration.nix
@@ -247,6 +247,7 @@
     neomutt urlscan
     notmuch
     aspell # spell checking in mail
+    thunderbird
     ## Rust
     rustup
     cargo-flamegraph