fix: nix flake

flake.nix

@@ -0,0 +1,52 @@
+{
+  description = "Flutter environment";
+
+  inputs = {
+    flake-utils.url = "github:numtide/flake-utils";
+    nixpkgs.url = "github:NixOS/nixpkgs";
+  };
+
+  outputs = {
+    self,
+    nixpkgs,
+    flake-utils,
+  }:
+    flake-utils.lib.eachSystem ["aarch64-linux"] (
+      system: let
+        pkgs = import nixpkgs {
+          inherit system;
+          config.allowUnfree = true;
+        };
+      in {
+        devShell = with pkgs;
+          mkShell rec {
+            FLUTTER_ROOT = flutter;
+            DART_ROOT = "${flutter}/bin/cache/dart-sdk";
+            QT_QPA_PLATFORM = "wayland;xcb"; # emulator related: try using wayland, otherwise fall back to X
+            buildInputs = [
+              flutter
+              gradle
+              jdk21
+              protobuf
+              buf
+              pandoc
+              libsecret.dev
+              gtk3.dev
+              grpcurl
+              glib
+              pcre2
+              pkg-config
+            ];
+            CMAKE_PREFIX_PATH = "${pkgs.lib.makeLibraryPath [libsecret.dev gtk3.dev]}";
+
+            # we need shellHook here as $PWD is not available in the nix environment
+            shellHook = ''
+              # TODO: feels super hacky, i feel like flutter is messing up somewhere here
+              # also probably breaks stuff when doing a release build
+              # we could provide shell scripts for building release/debug for nix users that set the correct dir
+              export CMAKE_INSTALL_PREFIX=$PWD/frontend/build/linux/arm64/debug/bundle
+            '';
+          };
+      }
+    );
+}