diff --git a/other.fish b/other.fish
index a731544..c6fbced 100644
--- a/other.fish
+++ b/other.fish
@@ -1,5 +1,5 @@
 function nixsh
-    if count $argv > /dev/null
+    if test (count $argv) = 0
         nix-shell --run "fish"
         return $status
     end