add flake.nix and rust-toolchain.toml

flake.nix

@@ -0,0 +1,58 @@
+{
+  description = "NixOS environment";
+
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
+  };
+
+  outputs = {
+    self,
+    nixpkgs,
+  }: let
+    system = "x86_64-linux";
+    pkgs = nixpkgs.legacyPackages.${system};
+  in {
+    devShell.${system} = with pkgs;
+      mkShell {
+        ###
+        ## Executable Packages
+        ###
+
+        buildInputs = with pkgs; [
+          clang
+          # Replace llvmPackages with llvmPackages_X, where X is the latest
+          # LLVM version (at the time of writing, 16)
+          llvmPackages_16.bintools
+          mold
+          pkg-config
+          rustup
+          yq-go
+        ];
+
+        ###
+        ## Rust Toolchain Setup
+        ###
+
+        shellHook = ''
+          export RUSTC_VERSION=$(yq ".toolchain.channel" rust-toolchain.toml)
+          export PATH=$PATH:''${CARGO_HOME:-~/.cargo}/bin
+          export PATH=$PATH:''${RUSTUP_HOME:-~/.rustup}/toolchains/$RUSTC_VERSION-x86_64-unknown-linux-gnu/bin/
+          rustup component add rust-analyzer
+        '';
+
+        ###
+        ## Rust Bindgen Setup
+        ###
+
+        # So bindgen can find libclang.so
+        LIBCLANG_PATH = pkgs.lib.makeLibraryPath [pkgs.llvmPackages_16.libclang.lib];
+        # Add headers to bindgen search path
+        BINDGEN_EXTRA_CLANG_ARGS =
+          # Includes with normal include path
+          builtins.map (a: ''-I"${a}/include"'') [
+            # add dev libraries here (e.g. pkgs.libvmi.dev)
+            pkgs.glibc.dev
+          ];
+      };
+  };
+}

rust-toolchain.toml

@@ -0,0 +1,3 @@
+[toolchain]
+profile = "default"
+channel = "1.74"