[bug#40601] [PATCH 2/7] guix-install.sh: Remove $UID bashism.

[Vincent Legoll]

* etc/guix-install.sh: Use `id -u' instead of $UID.
---
 etc/guix-install.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/etc/guix-install.sh b/etc/guix-install.sh
index 455e021684..0d7a8c8d44 100755
--- a/etc/guix-install.sh
+++ b/etc/guix-install.sh
@@ -29,7 +29,7 @@ fi
 
 set -e
 
-[ "$UID" -eq 0 ] || { echo "This script must be run as root."; exit 1; }
+[ "$(id -u)" -eq 0 ] || { echo "This script must be run as root."; exit 1; }
 
 REQUIRE=(
     "dirname"
-- 
2.26.2