large rewrite to make mize run on every platform

flake.nix

@@ -3,15 +3,61 @@
     # nixpkgs 35.11 still contains rust 1.73
 		nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
 
+    fenix = {
+      url = "github:nix-community/fenix";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+
+    crane = {
+      url = "github:ipetkov/crane";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+
  		flake-utils.url = "github:numtide/flake-utils";
   };
-  outputs = { flake-utils, nixpkgs, ... }@inputs: flake-utils.lib.eachDefaultSystem (system: let pkgs = nixpkgs.legacyPackages.${system}; in {
+  outputs = { self, flake-utils, nixpkgs, fenix, crane, ... }@inputs: flake-utils.lib.eachDefaultSystem (system: 
 
-      
-    #packages.default =
-    devShells.default = pkgs.mkShell {
-      buildInputs = with pkgs; [ cargo rustc ];
+############################## LET BINDINGS ##############################
+let
+  pkgs = nixpkgs.legacyPackages.${system};
+  wasmToolchain = fenix.packages.${system}.combine [
+    fenix.packages.${system}.targets.wasm32-unknown-unknown.stable.toolchain
+    fenix.packages.${system}.complete.toolchain
+  ];
+  osToolchain = fenix.packages.${system}.complete.toolchain;
+  wasmCrane = crane.lib.${system}.overrideToolchain wasmToolchain;
+  osCrane = crane.lib.${system}.overrideToolchain osToolchain;
+
+in {
+############################## PACKAGES ##############################
+    packages.default = osCrane.buildPackage {
+      src = "${self}";
     };
+
+    packages = {
+      wasm = wasmCrane.buildPackage {
+        src = "${self}";
+      };
+    };
+
+############################## DEV SHELLS ##############################
+    devShells.default = pkgs.mkShell {
+      buildInputs = with pkgs; [
+        wasm-pack #pkg-config openssl #cargo rustc
+        cargo-generate
+        /*
+        (fenix.packages.${system}.complete.withComponents [
+          "cargo"
+          "clippy"
+          "rust-src"
+          "rustc"
+          "rustfmt"
+        ])
+        */
+        (fenix.packages.${system}.combine [ wasmToolchain osToolchain ])
+      ];
+    };
+
   });
 }