From 90325d305e9a4d75e685a9605cec5c785d87be5e Mon Sep 17 00:00:00 2001
From: bluepython508 <16466646+bluepython508@users.noreply.github.com>
Date: Tue, 24 Sep 2024 22:25:30 +0100
Subject: [PATCH] Don't crash on unbound variables

---
 default.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/default.nix b/default.nix
index 0e39100..6c4de0b 100644
--- a/default.nix
+++ b/default.nix
@@ -38,7 +38,7 @@
     file="$FRAJTANO_DIR/cookie"
     (umask 077; [ -f "$file" ] || ${pkgs.coreutils}/bin/head -c 128 /dev/urandom | ${pkgs.coreutils}/bin/base64 -w0 > "$file")
     export RELEASE_COOKIE=$(${pkgs.coreutils}/bin/cat "$file")
-    [ -n $RELEASE_NODE ] || export RELEASE_NODE="frajtano-$(${pkgs.coreutils}/bin/whoami)@$(${pkgs.coreutils}/bin/cat /etc/hostname)"
+    [ -n ''${RELEASE_NODE:-} ] || export RELEASE_NODE="frajtano-$(${pkgs.coreutils}/bin/whoami)@$(${pkgs.coreutils}/bin/cat /etc/hostname)"
     run() {
       exec ${lib.getExe pkg} "$@"
     }