isolate ./nt and ./flake mixtures

flake.nix

@@ -1,17 +1,56 @@
 {
   description = "NixTypes (nt)";
 
-  outputs = inputs: let
+  inputs = {
+    systems.url = "github:nix-systems/default";
+
+    # NOTE: nixpkgs is only used in devshells
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-25.05";
+    # NOTE: nix-unit is only used in checks
+    nix-unit = {
+      url = "github:nix-community/nix-unit";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+  };
+
+  outputs = {
+    self,
+    systems,
+    nixpkgs,
+    nix-unit,
+  }: let
+    # TODO: implement mix.extend and mix.isolate
+    inherit
+      (mix)
+      extend
+      # isolate
+      newMixture
+      ;
+
+    # inputs accessible to all modules
+    base = {
+      inherit mix;
+      flake = self;
+    };
+
+    # flake dependencies
+    # NOTE: the NixTypes library has no dependencies
+    # NOTE: but the developer tooling (for me) does
+    deps = {
+      inherit systems nixpkgs nix-unit;
+    };
+
     # Step 1: Bootstrap and blast off (*zooommmmm whoooosshhhhh pppppeeeeeeewww*)
     bootstrap = import ./nt/primitives/bootstrap;
     # Step 2: Lie to Mix about its real identity (it's not ready for the truth...)
     mix = import ./nt/mix {this = bootstrap;};
   in
-    # Step 3: Actually import NixTypes
-    import ./nt {
-      inherit mix;
-      flake = inputs.self;
-    };
-
+    newMixture base (mixture: {
+      includes.public = [
+        (extend ./flake deps)
+        # Step 3: Actually import NixTypes
+        ./nt
+      ];
+    });
   # Step 4: Like and subscripe!!1!11!!!!!
 }