diff --git a/scripts/git-srv-admin.sh b/scripts/git-srv-admin.sh
index 88b4817c..3d478930 100644
--- a/scripts/git-srv-admin.sh
+++ b/scripts/git-srv-admin.sh
@@ -131,7 +131,7 @@ if [ "$user" ]; then
 	id=$user
 else
 	if [ "$SUDO_UID" ]; then
-		id=`/opt/jw-build/bin/getpwuid $SUDO_UID | sed '/^name *=/ !d; s/^name *= *//'`
+		id=`/usr/bin/getent passwd $SUDO_UID | cut -d: -f1`
 		[ "$id" ] || fatal "failed to find uid $SUDO_UID in user database"
 	fi
 	user=$id