diff --git a/.envrc b/.envrc
index 4fb998c..de76301 100644
--- a/.envrc
+++ b/.envrc
@@ -7,5 +7,10 @@ watch_file flake.lock
 {
   # shell gc root dir
   mkdir -p "$(direnv_layout_dir)"
-  eval "$(nix print-dev-env --no-update-lock-file --no-write-lock-file --profile $(direnv_layout_dir)/flake-profile)"
+  if test -n "$(command -v nix3)"; then
+    nix=nix3
+  else
+    nix=nix
+  fi
+  eval "$($nix print-dev-env --no-update-lock-file --no-write-lock-file --profile $(direnv_layout_dir)/flake-profile)"
 }