From 30af4a9e27cdafd4be6997c9764c5c9b229ea550 Mon Sep 17 00:00:00 2001
From: Michael Gallagher <mjgallag@gmail.com>
Date: Thu, 15 Aug 2024 17:56:05 -0700
Subject: [PATCH] nix-daemon.sh profile script: operate under `set -u` in bash

see https://github.com/NixOS/nix/commit/d459d3307c7b1b10f6489ed048fff192e7834928
---
 scripts/nix-profile-daemon.sh.in | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/nix-profile-daemon.sh.in b/scripts/nix-profile-daemon.sh.in
index eb124c0b5..59c00d491 100644
--- a/scripts/nix-profile-daemon.sh.in
+++ b/scripts/nix-profile-daemon.sh.in
@@ -52,7 +52,7 @@ elif [ -e /etc/pki/tls/certs/ca-bundle.crt ]; then # Fedora, CentOS
 else
   # Fall back to what is in the nix profiles, favouring whatever is defined last.
   check_nix_profiles() {
-    if [ -n "$ZSH_VERSION" ]; then
+    if [ -n "${ZSH_VERSION:-}" ]; then
       # Zsh by default doesn't split words in unquoted parameter expansion.
       # Set local_options for these options to be reverted at the end of the function
       # and shwordsplit to force splitting words in $NIX_PROFILES below.