diff --git a/contrib/nixos/modules/copyparty.nix b/contrib/nixos/modules/copyparty.nix
index 994b2575..1f8242df 100644
--- a/contrib/nixos/modules/copyparty.nix
+++ b/contrib/nixos/modules/copyparty.nix
@@ -50,6 +50,7 @@ let
 
   configStr = ''
     ${mkSection "global" cfg.settings}
+    ${cfg.globalExtraConfig}
     ${mkSection "accounts" (accountsWithPlaceholders cfg.accounts)}
     ${concatStringsSep "\n" (mapAttrsToList mkVolume cfg.volumes)}
   '';
@@ -131,6 +132,12 @@ in
       '';
     };
 
+    globalExtraConfig = mkOption {
+      type = types.str;
+      default = "";
+      description = "Appended to the end of the [global] section verbatim. This is useful for flags which are used in a repeating manner (e.g. ipu: 255.255.255.1=user) which can't be repeated in the settings = {} attribute set.";
+    };
+
     accounts = mkOption {
       type = types.attrsOf (
         types.submodule (
@@ -373,3 +380,4 @@ in
     }
   );
 }
+