From 6b405f9789797cd5a3a5d13a69dc6ef1164b3a15 Mon Sep 17 00:00:00 2001
From: Chuck <chuck@intelligence.org>
Date: Fri, 6 Sep 2019 12:27:34 -0700
Subject: [PATCH] Fix missing "using ThrownError"

---
 nixos/modules/installer/tools/nixos-option/nixos-option.cc | 1 +
 1 file changed, 1 insertion(+)

diff --git a/nixos/modules/installer/tools/nixos-option/nixos-option.cc b/nixos/modules/installer/tools/nixos-option/nixos-option.cc
index 1fde8986fdf5..383755f884a1 100644
--- a/nixos/modules/installer/tools/nixos-option/nixos-option.cc
+++ b/nixos/modules/installer/tools/nixos-option/nixos-option.cc
@@ -37,6 +37,7 @@ using nix::PathSet;
 using nix::Strings;
 using nix::Symbol;
 using nix::tAttrs;
+using nix::ThrownError;
 using nix::tLambda;
 using nix::tString;
 using nix::UsageError;