move mix to /nt/mix

flake.nix

@@ -5,7 +5,7 @@
     # 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/primitives/mix {this = bootstrap;};
+    mix = import ./nt/mix {this = bootstrap;};
   in
     # Step 3: Actually import NixTypes
     import ./nt {inherit mix;};

nt/primitives/default.nix

@@ -5,7 +5,6 @@ mix.newMixture inputs (mixture: {
     ./bootstrap
   ];
   submods.public = [
-    ./mix
     # TODO: make ./util private
     ./util
   ];