diff --git a/SwarselSystems.org b/SwarselSystems.org
index 0806dd5..129840e 100644
--- a/SwarselSystems.org
+++ b/SwarselSystems.org
@@ -419,7 +419,7 @@ In this section I am creating some attributes that define general concepts of my
 
     checks = lib.swarselsystems.forAllSystems (system:
       let
-        pkgs = nixpkgs.legacyPackages.${system};
+        pkgs = lib.swarselsystems.pkgsFor.${system};
       in
         import ./checks { inherit self inputs system pkgs; }
     );
diff --git a/flake.nix b/flake.nix
index ec980a9..e0e2ae9 100644
--- a/flake.nix
+++ b/flake.nix
@@ -171,7 +171,7 @@
 
       checks = lib.swarselsystems.forAllSystems (system:
         let
-          pkgs = nixpkgs.legacyPackages.${system};
+          pkgs = lib.swarselsystems.pkgsFor.${system};
         in
         import ./checks { inherit self inputs system pkgs; }
       );