diff --git a/ext/devenv.nix b/ext/devenv.nix
index 2b7e0d590..7ef303154 100644
--- a/ext/devenv.nix
+++ b/ext/devenv.nix
@@ -9,6 +9,8 @@
     pkgs.git
     pkgs.hyperfine
     pkgs.python3Packages.pytest
+
+    pkgs.cargo-cache
   ];
 
   # https://devenv.sh/tests/