nixos/syslog-ng: Add option configHeader

1 files changed, 12 insertions, 2 deletions

diff --git a/nixos/modules/services/logging/syslog-ng.nix b/nixos/modules/services/logging/syslog-ng.nix
index 64b288a11cd3..f3991a411ec4 100644
--- a/nixos/modules/services/logging/syslog-ng.nix
+++ b/nixos/modules/services/logging/syslog-ng.nix
@@ -7,8 +7,7 @@ let
   cfg = config.services.syslog-ng;
 
   syslogngConfig = pkgs.writeText "syslog-ng.conf" ''
-    @version: 3.5
-    @include "scl.conf"
+    ${cfg.configHeader}
     ${cfg.extraConfig}
   '';
 
@@ -72,6 +71,17 @@ in {
           Configuration added to the end of <literal>syslog-ng.conf</literal>.
         '';
       };
+      configHeader = mkOption {
+        type = types.lines;
+        default = ''
+          @version: 3.5
+          @include "scl.conf"
+        '';
+        description = ''
+          The very first lines of the configuration file. Should usually contain
+          the syslog-ng version header.
+        '';
+      };
     };
   };