fix: nix flake for x86_64 arch (#137)

flake.nix

@@ -11,15 +11,15 @@
     nixpkgs,
     flake-utils,
   }:
-    flake-utils.lib.eachSystem ["aarch64-linux"] (
+    flake-utils.lib.eachSystem ["x86_64-linux"] (
       system: let
         pkgs = import nixpkgs {
           inherit system;
           config.allowUnfree = true;
         };
       in {
         devShell = with pkgs;
-          mkShell rec {
+          mkShell {
             FLUTTER_ROOT = flutter;
             DART_ROOT = "${flutter}/bin/cache/dart-sdk";
             QT_QPA_PLATFORM = "wayland;xcb"; # emulator related: try using wayland, otherwise fall back to X
@@ -44,7 +44,7 @@
               # TODO: feels super hacky, i feel like flutter is messing up somewhere here
               # also probably breaks stuff when doing a release build
               # we could provide shell scripts for building release/debug for nix users that set the correct dir
-              export CMAKE_INSTALL_PREFIX=$PWD/frontend/build/linux/arm64/debug/bundle
+              export CMAKE_INSTALL_PREFIX=$PWD/frontend/build/linux/x64/debug/bundle
             '';
           };
       }