working rust package override

plus flake update :P

modules/common/core.nix

@@ -8,6 +8,9 @@
 
   # Allow unfree packages
   nixpkgs.config.allowUnfree = true;
+  nixpkgs.config.permittedInsecurePackages = [
+    "mbedtls-2.28.10"
+  ];
 
   nix.package = pkgs.nix;