no-cross.diff

diff --git a/modules/system-target.nix b/modules/system-target.nix
index a0ad63c2c262..16b796c09e22 100644
--- a/modules/system-target.nix
+++ b/modules/system-target.nix
@@ -39,27 +39,6 @@ in
   };
 
   config = {
-    assertions = [
-      {
-        assertion = pkgs.targetPlatform.system == cfg.system;
-        message = "pkgs.targetPlatform.system expected to be `${cfg.system}`, is `${pkgs.targetPlatform.system}`";
-      }
-    ];
-
-    nixpkgs.crossSystem = lib.mkIf
-      (
-        let
-          result = selectedPlatform.system != builtins.currentSystem;
-        in
-        builtins.trace
-        "Building with crossSystem?: ${selectedPlatform.system} != ${builtins.currentSystem} → ${if result then "we are" else "we're not"}."
-        result
-      )
-      (
-        builtins.trace
-        "    crossSystem: config: ${selectedPlatform.config}"
-        selectedPlatform
-      )
-    ;
+    nixpkgs.localSystem = selectedPlatform;
   };
 }