From 5ad71cfe84a49fc27ebcf7c810bcced1361a6e6e Mon Sep 17 00:00:00 2001
From: Matt McHenry <github@matt.mchenryfamily.org>
Date: Fri, 31 Jan 2020 22:06:19 -0500
Subject: [PATCH] fix pruneCmd to use optionals so multi-element list is
 preserved

---
 nixos/modules/services/backup/restic.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/nixos/modules/services/backup/restic.nix b/nixos/modules/services/backup/restic.nix
index e1dccbba7632..2388f1d6ca13 100644
--- a/nixos/modules/services/backup/restic.nix
+++ b/nixos/modules/services/backup/restic.nix
@@ -166,7 +166,7 @@ in
           backupPaths = if (backup.dynamicFilesFrom == null)
                         then concatStringsSep " " backup.paths
                         else "--files-from ${filesFromTmpFile}";
-          pruneCmd = optional (builtins.length backup.pruneOpts > 0) [
+          pruneCmd = optionals (builtins.length backup.pruneOpts > 0) [
             ( resticCmd + " forget --prune " + (concatStringsSep " " backup.pruneOpts) )
             ( resticCmd + " check" )
           ];