diff --git a/templates/rust/flake.nix b/templates/rust/flake.nix
index 57d515b..2340be6 100644
--- a/templates/rust/flake.nix
+++ b/templates/rust/flake.nix
@@ -1,5 +1,5 @@
 {
-  inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+  inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
   inputs.git-hooks.url = "github:cachix/git-hooks.nix";
   inputs.git-hooks.inputs.nixpkgs.follows = "nixpkgs";
   outputs = inputs: let
diff --git a/templates/rust/nix/packages.nix b/templates/rust/nix/packages.nix
index 43327bd..bf515cf 100644
--- a/templates/rust/nix/packages.nix
+++ b/templates/rust/nix/packages.nix
@@ -1,8 +1,11 @@
 {pkgs, ...}: let
+  inherit (builtins) fromTOML readFile;
   pname = "my-package";
+  src = ./..;
   main-package = pkgs.rustPlatform.buildRustPackage {
-    inherit pname;
-    version = "0.1.0";
+    inherit pname src;
+    version = (fromTOML (readFile "${src}/Cargo.toml")).package.version;
+    # or for workspaces: version = (fromTOML (readFile "${src}/${pname}/Cargo.toml")).package.version;
 
     /*
     nativeBuildInputs = with pkgs; [
@@ -14,8 +17,6 @@
     ];
     */
 
-    src = ./..;
-    hash = pkgs.lib.fakeHash;
     cargoHash = pkgs.lib.fakeHash;
     useFetchCargoVendor = true;
   };