diff --git a/profiles/workspace/zsh/p10k.zsh b/profiles/workspace/zsh/p10k.zsh
index 77e3465..272280e 100644
--- a/profiles/workspace/zsh/p10k.zsh
+++ b/profiles/workspace/zsh/p10k.zsh
@@ -1672,7 +1672,7 @@
   }
 
   function prompt_nix_shell_with_name() {
-    if [[ -n "${IN_NIX_SHELL-:}" ]]; then
+    if [[ -n "${IN_NIX_SHELL-}" ]]; then
       if [[ "${name-nix-shell}" != nix-shell ]]; then
         p10k segment -b 4 -f 15 -r -i NIX_SHELL_ICON -t "$name"
       else