diff --git a/nixos/modules/hardware/fw-fanctrl.nix b/nixos/modules/hardware/fw-fanctrl.nix
index feb434853eade..01df7ae3fb5f4 100644
--- a/nixos/modules/hardware/fw-fanctrl.nix
+++ b/nixos/modules/hardware/fw-fanctrl.nix
@@ -30,7 +30,7 @@ in
         Additional config entries for the fw-fanctrl service (documentation: <https://github.com/TamtamHero/fw-fanctrl/blob/main/doc/configuration.md>)
       '';
       type = lib.types.submodule {
-        freeformType = configFormat.type;
+        freeformType = lib.types.attrsOf configFormat.type;
         options = {
           defaultStrategy = lib.mkOption {
             type = lib.types.str;
diff --git a/nixos/modules/programs/openvpn3.nix b/nixos/modules/programs/openvpn3.nix
index 2ab5fbfc90839..88c2660055c19 100644
--- a/nixos/modules/programs/openvpn3.nix
+++ b/nixos/modules/programs/openvpn3.nix
@@ -18,7 +18,12 @@ let
     options
     lists
     ;
-  inherit (lib.types) bool submodule ints;
+  inherit (lib.types)
+    bool
+    submodule
+    ints
+    attrsOf
+    ;
 in
 {
   options.programs.openvpn3 = {
@@ -33,7 +38,7 @@ in
             description = "Options stored in {file}`/etc/openvpn3/netcfg.json` configuration file";
             default = { };
             type = submodule {
-              freeformType = json.type;
+              freeformType = attrsOf json.type;
               options = {
                 systemd_resolved = mkOption {
                   type = bool;
@@ -57,7 +62,7 @@ in
             description = "Options stored in {file}`/etc/openvpn3/log-service.json` configuration file";
             default = { };
             type = submodule {
-              freeformType = json.type;
+              freeformType = attrsOf json.type;
               options = {
                 journald = mkOption {
                   description = "Use systemd-journald";
diff --git a/nixos/modules/security/agnos.nix b/nixos/modules/security/agnos.nix
index dbd93afdb263f..7697fa5e523f1 100644
--- a/nixos/modules/security/agnos.nix
+++ b/nixos/modules/security/agnos.nix
@@ -15,7 +15,7 @@ let
       inherit (lib) types mkOption;
     in
     types.submodule {
-      freeformType = format.type;
+      freeformType = types.attrsOf format.type;
 
       options = {
         email = mkOption {
@@ -53,7 +53,7 @@ let
       inherit (lib) types literalExpression mkOption;
     in
     types.submodule {
-      freeformType = format.type;
+      freeformType = types.attrsOf format.type;
 
       options = {
         domains = mkOption {
@@ -91,7 +91,7 @@ in
       settings = mkOption {
         description = "Settings";
         type = types.submodule {
-          freeformType = format.type;
+          freeformType = types.attrsOf format.type;
 
           options = {
             dns_listen_addr = mkOption {
diff --git a/nixos/modules/services/admin/meshcentral.nix b/nixos/modules/services/admin/meshcentral.nix
index 6d8be447645d8..f736429fd234d 100644
--- a/nixos/modules/services/admin/meshcentral.nix
+++ b/nixos/modules/services/admin/meshcentral.nix
@@ -24,7 +24,7 @@ with lib;
         - [Old homepage with documentation link](https://www.meshcommander.com/meshcentral2)
       '';
       type = types.submodule {
-        freeformType = configFormat.type;
+        freeformType = attrsOf configFormat.type;
       };
       example = {
         settings = {