diff --git a/setup-mac.sh b/setup-mac.sh
index 53f9f1b..27d58a5 100755
--- a/setup-mac.sh
+++ b/setup-mac.sh
@@ -14,8 +14,8 @@ mkdir -p "$HOME/.config/nix"
 if [ ! -f "$HOME/.config/nix/nix.conf" ] ; then
   echo "experimental-features = nix-command flakes" >> ~/.config/nix/nix.conf
   echo "trusted-users = root andrew" | sudo tee -a /etc/nix/nix.conf && sudo pkill nix-daemon
-  nix profile install nixpkgs#cachix
   cachix use devenv
+  nix profile install --accept-flake-config github:cachix/devenv/latest
 fi
 
 function has_bin() {