diff --git a/devenv/src/cnix.rs b/devenv/src/cnix.rs
index fa8a2738e..703502cf1 100644
--- a/devenv/src/cnix.rs
+++ b/devenv/src/cnix.rs
@@ -355,7 +355,6 @@ impl<'a> Nix<'a> {
             cached_cmd.watch_path(self.devenv_root.join("devenv.yaml"));
             cached_cmd.watch_path(self.devenv_root.join("devenv.lock"));
 
-            cached_cmd.unwatch_path(self.devenv_root.join(".devenv.flake.nix"));
             // Ignore anything in .devenv.
             cached_cmd.unwatch_path(&self.devenv_dotfile);