diff --git a/nixos/modules/services/search/elasticsearch.nix b/nixos/modules/services/search/elasticsearch.nix
index 3f676db27523..40ebe29c9a60 100644
--- a/nixos/modules/services/search/elasticsearch.nix
+++ b/nixos/modules/services/search/elasticsearch.nix
@@ -5,13 +5,13 @@ with lib;
 let
   cfg = config.services.elasticsearch;
 
+  es7 = builtins.compareVersions cfg.package.version "7" >= 0;
+
   esConfig = ''
     network.host: ${cfg.listenAddress}
     cluster.name: ${cfg.cluster_name}
-    ${lib.optionalString cfg.single_node ''
-      discovery.type: single-node
-      gateway.auto_import_dangling_indices: true
-    ''}
+    ${lib.optionalString cfg.single_node "discovery.type: single-node"}
+    ${lib.optionalString (cfg.single_node && es7) "gateway.auto_import_dangling_indices: true"}
 
     http.port: ${toString cfg.port}
     transport.port: ${toString cfg.tcp_port}