diff --git a/zoo/.envrc b/zoo/.envrc
new file mode 100644
index 000000000..4a4726a5c
--- /dev/null
+++ b/zoo/.envrc
@@ -0,0 +1 @@
+use_nix
diff --git a/zoo/shell.nix b/zoo/shell.nix
deleted file mode 100644
index 465f0b05c..000000000
--- a/zoo/shell.nix
+++ /dev/null
@@ -1,10 +0,0 @@
-let
-  briefcase = import /home/wpcarro/briefcase {};
-in briefcase.buildHaskell.shell {
-  deps = hpkgs: with hpkgs; [
-    hspec
-    rio
-    string-conversions
-    servant-server
-  ];
-}