maybe helpers?

flake.nix

@@ -233,7 +233,32 @@
       flakeInputs = self.inputs;
     };
 
-    nixosConfigurations = {
+    nixosConfigurations = let
+      system = {
+        nixpkgsInput,
+        modules ? [],
+        system ? "x86_64-linux",
+      }:
+        nixpkgsInput.lib.nixosSystem {
+          inherit system;
+          modules = modules ++ [nixosModules.common];
+        };
+      stableSystem = {
+        modules,
+        system ? "x86_64-linux",
+      }:
+        system {
+          nixpkgsInput = nixpkgs;
+          modules = modules ++ [nixosModules.stableCommon];
+        };
+      unstableSystem = {
+        modules,
+        system ? "x86_64-linux",
+      }:
+        nixpkgs-unstable.lib.nixosSystem {
+nixosModules.stableCommon
+        };
+    in {
       beefcake = nixpkgs.lib.nixosSystem {
         system = "x86_64-linux";
         modules = with nixosModules; [