diff --git a/nixos/tests/userborn-immutable-etc.nix b/nixos/tests/userborn-immutable-etc.nix
index 68c521b19148..e95fba23063b 100644
--- a/nixos/tests/userborn-immutable-etc.nix
+++ b/nixos/tests/userborn-immutable-etc.nix
@@ -20,7 +20,7 @@ in
   meta.maintainers = with lib.maintainers; [ nikstur ];
 
   nodes.machine =
-    { pkgs, ... }:
+    { config, ... }:
     {
       imports = [ common ];
 
@@ -36,8 +36,8 @@ in
       specialisation.new-generation = {
         inheritParentConfig = false;
         configuration = {
-          nixpkgs.hostPlatform = {
-            inherit (pkgs.stdenv.hostPlatform) system;
+          nixpkgs = {
+            inherit (config.nixpkgs) hostPlatform;
           };
           imports = [ common ];
 
diff --git a/nixos/tests/userborn-immutable-users.nix b/nixos/tests/userborn-immutable-users.nix
index c7a8176a00c1..887d2d312eb7 100644
--- a/nixos/tests/userborn-immutable-users.nix
+++ b/nixos/tests/userborn-immutable-users.nix
@@ -16,7 +16,7 @@ in
   meta.maintainers = with lib.maintainers; [ nikstur ];
 
   nodes.machine =
-    { pkgs, ... }:
+    { config, ... }:
     {
       imports = [ common ];
 
@@ -32,8 +32,8 @@ in
       specialisation.new-generation = {
         inheritParentConfig = false;
         configuration = {
-          nixpkgs.hostPlatform = {
-            inherit (pkgs.stdenv.hostPlatform) system;
+          nixpkgs = {
+            inherit (config.nixpkgs) hostPlatform;
           };
           imports = [ common ];
 
diff --git a/nixos/tests/userborn-mutable-etc.nix b/nixos/tests/userborn-mutable-etc.nix
index 0f82c003f94c..6199b84ce71d 100644
--- a/nixos/tests/userborn-mutable-etc.nix
+++ b/nixos/tests/userborn-mutable-etc.nix
@@ -20,7 +20,7 @@ in
   meta.maintainers = with lib.maintainers; [ nikstur ];
 
   nodes.machine =
-    { pkgs, ... }:
+    { config, ... }:
     {
       imports = [ common ];
 
@@ -36,8 +36,8 @@ in
       specialisation.new-generation = {
         inheritParentConfig = false;
         configuration = {
-          nixpkgs.hostPlatform = {
-            inherit (pkgs.stdenv.hostPlatform) system;
+          nixpkgs = {
+            inherit (config.nixpkgs) hostPlatform;
           };
           imports = [ common ];
 
diff --git a/nixos/tests/userborn-mutable-users.nix b/nixos/tests/userborn-mutable-users.nix
index fd256425556c..e2b9c3df4953 100644
--- a/nixos/tests/userborn-mutable-users.nix
+++ b/nixos/tests/userborn-mutable-users.nix
@@ -16,7 +16,7 @@ in
   meta.maintainers = with lib.maintainers; [ nikstur ];
 
   nodes.machine =
-    { pkgs, ... }:
+    { config, ... }:
     {
       imports = [ common ];
 
@@ -33,8 +33,8 @@ in
       specialisation.new-generation = {
         inheritParentConfig = false;
         configuration = {
-          nixpkgs.hostPlatform = {
-            inherit (pkgs.stdenv.hostPlatform) system;
+          nixpkgs = {
+            inherit (config.nixpkgs) hostPlatform;
           };
           imports = [ common ];