Make it a list, then concat

2023-09-25 10:03:24 -07:00 · 2023-09-25 10:03:24 -07:00 · 333fed167f
parent 06b7134a00
commit 333fed167f
1 changed files with 2 additions and 2 deletions
--- a/postfix.nix
+++ b/postfix.nix
@ -459,8 +459,8 @@ in {
          lmtp.args = [ "flags=DO" ];
          policy-spf = let
            policydSpfConfig = concatStringsSep "\n"
-              (cfg.policy-spf.extra-config
-                + (lib.optionalString cfg.debug "debugLevel = 4"));
+              ([ cfg.policy-spf.extra-config ]
+                ++ (lib.optional cfg.debug "debugLevel = 4"));
          in {
            type = "unix";
            privileged = true;