diff --git a/flake.nix b/flake.nix
index e948a9d467d4..e2c040406c2b 100644
--- a/flake.nix
+++ b/flake.nix
@@ -93,9 +93,15 @@
             cargo-watch
             cargo-edit
             clippy
+            gemini-cli # potentially useful during dev/testing
+            go_1_25 # 'just' run-ui (temporal-service)
+            just # used in dev/test
+            nodejs_24 # 'just' run-ui
+            ripgrep
             rustfmt
             xorg.libxcb
             dbus
+            yarn # 'just' install-deps
           ]);
           
           shellHook = ''