diff --git a/checks/backups/flake-module.nix b/checks/backups/flake-module.nix
index d237cb138..a48a3bd21 100644
--- a/checks/backups/flake-module.nix
+++ b/checks/backups/flake-module.nix
@@ -10,7 +10,6 @@
       {
         pkgs,
         lib,
-        config,
         ...
       }:
       let
@@ -30,6 +29,7 @@
         clan.core.networking.targetHost = "machine";
         networking.hostName = "machine";
         services.openssh.settings.UseDns = false;
+        nixpkgs.hostPlatform = "x86_64-linux";
 
         programs.ssh.knownHosts = {
           machine.hostNames = [ "machine" ];
diff --git a/checks/installation/flake-module.nix b/checks/installation/flake-module.nix
index 3ab30c8be..dd39b94ed 100644
--- a/checks/installation/flake-module.nix
+++ b/checks/installation/flake-module.nix
@@ -20,13 +20,13 @@
 
         environment.etc."install-successful".text = "ok";
 
+        nixpkgs.hostPlatform = "x86_64-linux";
         boot.consoleLogLevel = lib.mkForce 100;
         boot.kernelParams = [ "boot.shell_on_fail" ];
       };
   };
   perSystem =
     {
-      nodes,
       pkgs,
       lib,
       ...
diff --git a/checks/nixos-documentation/flake-module.nix b/checks/nixos-documentation/flake-module.nix
index 743d97c19..b8351ac67 100644
--- a/checks/nixos-documentation/flake-module.nix
+++ b/checks/nixos-documentation/flake-module.nix
@@ -18,6 +18,7 @@ in
       # Dummy file system
       fileSystems."/".device = "/dev/null";
       boot.loader.grub.device = "/dev/null";
+      nixpkgs.hostPlatform = "x86_64-linux";
       imports = [
         documentationModule
       ];
diff --git a/lib/build-clan/tests.nix b/lib/build-clan/tests.nix
index 5bfe6aab5..f7617a783 100644
--- a/lib/build-clan/tests.nix
+++ b/lib/build-clan/tests.nix
@@ -146,6 +146,7 @@ in
           { foo, ... }:
           {
             networking.hostName = foo;
+            nixpkgs.hostPlatform = "x86_64-linux";
           };
       };
     in
diff --git a/machines/test-inventory-machine/facter.json b/machines/test-inventory-machine/facter.json
new file mode 100644
index 000000000..7b6fc7a61
--- /dev/null
+++ b/machines/test-inventory-machine/facter.json
@@ -0,0 +1,4 @@
+{
+  "version": 1,
+  "system": "x86_64-linux"
+}