Your first flake Adds a `flake.nix` so the repo builds under Nix and can run on NixCI. ## What it does - Builds with **crane** + the **oxalica rust-overlay** (x86_64-linux). - Outputs: native CLI, static `x86_64-unknown-linux-musl` and cross `aarch64-unknown-linux-musl` release binaries, the wasm inspect UI, the npm package, plus `clippy`, `rustfmt` and the test suite — all wired into `nix flake check`. - **One shared dependency derivation.** crane reduces its source to cargo metadata only (every `.rs` replaced by a stub), so editing source code never rebuilds dependencies. Proof you can run yourself: `./nix/experiments/deps-cache-stability.sh`. - `wasm-bindgen-cli` pinned to `0.2.125` to match the `wasm-bindgen` crate (nixpkgs only ships `0.2.121`). Also reformats the `antithesis_sdk` workspace dependency to a single-line inline table: Nix's strict TOML 1.0 parser rejects the multi-line form (cargo tolerates it). Semantically identical. ## CI Running on NixCI staging here: https://staging.nix-ci.com/gh:NorfairKing:bombadil/your-first-flake/da7842956e34a25884837f06a403d25f27710017