From 55838174936152d34e9d1b419f73768a9bb8904f Mon Sep 17 00:00:00 2001
From: Mikhail Klementev <blame@dumpstack.io>
Date: Fri, 2 Aug 2019 14:58:37 +0000
Subject: [PATCH] Force update all channels before upgrade

---
 configuration.nix | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/configuration.nix b/configuration.nix
index 22d157c..cb10954 100644
--- a/configuration.nix
+++ b/configuration.nix
@@ -60,6 +60,10 @@ in {
     };
   };
 
+  # force update all channels
+  systemd.services.nixos-upgrade.serviceConfig.ExecStartPre =
+    "${pkgs.nix}/bin/nix-channel --update";
+
   systemd.services.nixos-upgrade.serviceConfig.ExecStartPost = pkgs.writeScript "post-upgrade-check" ''
     #!${pkgs.stdenv.shell}
     current=$(readlink -f /run/current-system/kernel)