flake

.envrc

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+use flake

flake.nix

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+{
+  description = "A nix flake for nightly rust";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    rust-overlays.url = "github:oxalica/rust-overlay";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = { self, nixpkgs, flake-utils, rust-overlays, ...}: 
+    flake-utils.lib.eachDefaultSystem (system: let
+      overlays = [
+        (import rust-overlays)
+      ];
+      pkgs = import nixpkgs {
+        inherit system overlays;
+      };
+      rust = pkgs.rust-bin.selectLatestNightlyWith (toolchain: toolchain.default.override {
+        extensions = ["rust-src" "rust-analyzer"];
+        targets = [ "x86_64-unknown-linux-gnu" ];
+      });
+    in with pkgs; {
+      devShells.default = pkgs.mkShell {
+        buildInputs = [
+          pkg-config
+          mold
+          clang
+          nasm
+          nasmfmt
+          git
+          rust
+        ];
+      };
+    });
+}