nixos/nomad: fix multi-plugin-dir path

nixos/doc/manual/from_md/release-notes/rl-2305.section.xml

@@ -609,6 +609,13 @@
           information about the current generation revision
         </para>
       </listitem>
+      <listitem>
+        <para>
+          The option
+          <literal>services.nomad.extraSettingsPlugins</literal> has
+          been fixed to allow more than one plugin in the path.
+        </para>
+      </listitem>
     </itemizedlist>
   </section>
 </section>

nixos/doc/manual/release-notes/rl-2305.section.md

@@ -156,3 +156,5 @@ In addition to numerous new and upgraded packages, this release has the followin
 - [Xastir](https://xastir.org/index.php/Main_Page) can now access AX.25 interfaces via the `libax25` package.
 
 - `nixos-version` now accepts `--configuration-revision` to display more information about the current generation revision
+
+- The option `services.nomad.extraSettingsPlugins` has been fixed to allow more than one plugin in the path.

nixos/modules/services/networking/nomad.nix

@@ -67,7 +67,7 @@ in
           Additional plugins dir used to configure nomad.
         '';
         example = literalExpression ''
-          [ "<pluginDir>" pkgs.<plugins-name> ]
+          [ "<pluginDir>" pkgs.nomad-driver-nix pkgs.nomad-driver-podman  ]
         '';
       };
 
@@ -139,9 +139,16 @@ in
         {
           DynamicUser = cfg.dropPrivileges;
           ExecReload = "${pkgs.coreutils}/bin/kill -HUP $MAINPID";
-          ExecStart = "${cfg.package}/bin/nomad agent -config=/etc/nomad.json" +
-            concatMapStrings (path: " -config=${path}") cfg.extraSettingsPaths +
-            concatMapStrings (path: " -plugin-dir=${path}/bin") cfg.extraSettingsPlugins;
+          ExecStart =
+            let
+              pluginsDir = pkgs.symlinkJoin
+                {
+                  name = "nomad-plugins";
+                  paths = cfg.extraSettingsPlugins;
+                };
+            in
+            "${cfg.package}/bin/nomad agent -config=/etc/nomad.json -plugin-dir=${pluginsDir}/bin" +
+            concatMapStrings (path: " -config=${path}") cfg.extraSettingsPaths;
           KillMode = "process";
           KillSignal = "SIGINT";
           LimitNOFILE = 65536;