adding cargo...

flake.nix

@@ -2,20 +2,31 @@
   description = "A Church Presentation Application";
 
   inputs = {
+    cargo2nix.url = "github:cargo2nix/cargo2nix/release-0.11.0";
     nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
     flake-utils.url = "github:numtide/flake-utils";
   };
 
-  outputs = { self, nixpkgs, flake-utils }:
+  outputs = inputs: with inputs;
     flake-utils.lib.eachDefaultSystem
       (system:
         let
-          pkgs = nixpkgs.legacyPackages.${system};
+          pkgs = import nixpkgs {
+            inherit system;
+            overlays = [cargo2nix.overlays.default];
+          };
           src = ./.;
-        in 
+          rustPkgs = pkgs.rustBuilder.makePackageSet {
+            rustVersion = "1.61.0";
+            packageFun = import ./Cargo.nix;
+          };
+
+        in rec
         {
-          devShell = import ./shell.nix { inherit pkgs; };
-          defaultPackage = pkgs.libsForQt5.callPackage ./default.nix {};
+            libre-presenter = (rustPkgs.workspace.libre-presenter {}).bin;
+
+            devShell = import ./shell.nix { inherit pkgs; };
+            defaultPackage = pkgs.libsForQt5.callPackage ./default.nix {};
         }
       );
 }