diff --git a/nixos/modules/virtualisation/cri-o.nix b/nixos/modules/virtualisation/cri-o.nix
index 70e7c8794d4..f05ba3ff092 100644
--- a/nixos/modules/virtualisation/cri-o.nix
+++ b/nixos/modules/virtualisation/cri-o.nix
@@ -1,14 +1,13 @@
 { config, lib, pkgs, ... }:
 
 with lib;
-
 let
   cfg = config.virtualisation.cri-o;
 
   crioPackage = (pkgs.cri-o.override { inherit (cfg) extraPackages; });
 
   # Copy configuration files to avoid having the entire sources in the system closure
-  copyFile = filePath: pkgs.runCommandNoCC (builtins.unsafeDiscardStringContext (builtins.baseNameOf filePath)) {} ''
+  copyFile = filePath: pkgs.runCommandNoCC (builtins.unsafeDiscardStringContext (builtins.baseNameOf filePath)) { } ''
     cp ${filePath} $out
   '';
 in
@@ -78,6 +77,13 @@ in
         The final CRI-O package (including extra packages).
       '';
     };
+
+    networkDir = mkOption {
+      type = types.nullOr types.path;
+      default = null;
+      description = "Override the network_dir option.";
+      internal = true;
+    };
   };
 
   config = mkIf cfg.enable {
@@ -95,6 +101,7 @@ in
 
       [crio.network]
       plugin_dirs = ["${pkgs.cni-plugins}/bin/"]
+      ${optionalString (cfg.networkDir != null) ''network_dir = "${cfg.networkDir}"''}
 
       [crio.runtime]
       cgroup_manager = "systemd"