flake

.envrc

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+use flake .

.gitignore

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+/.direnv/

flake.lock

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+{
+  "nodes": {
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1731533236,
+        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1784007870,
+        "narHash": "sha256-djcLt/JJphyNt4eDY9XTly+/WbCK5lqWq9lSgCmJkkQ=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "18b9261cb3294b6d2a06d03f96872827b8fe2698",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs_2": {
+      "locked": {
+        "lastModified": 1744536153,
+        "narHash": "sha256-awS2zRgF4uTwrOKwwiJcByDzDOdo3Q1rPZbiHQg/N38=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "18dd725c29603f582cf1900e0d25f9f1063dbf11",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs",
+        "rust-overlays": "rust-overlays"
+      }
+    },
+    "rust-overlays": {
+      "inputs": {
+        "nixpkgs": "nixpkgs_2"
+      },
+      "locked": {
+        "lastModified": 1784091390,
+        "narHash": "sha256-aILAwrBQPhKldL98N8lmsbfst3OPtbMM4vT2VXn40/Y=",
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "rev": "a7887636a3959168bd1ba7ef24a8a70b168dcb56",
+        "type": "github"
+      },
+      "original": {
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "type": "github"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

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+{
+  description = "An x86 kernel written in Rust";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    rust-overlays.url = "github:oxalica/rust-overlay";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = { nixpkgs, flake-utils, rust-overlays, ...}: 
+    flake-utils.lib.eachDefaultSystem (system: let
+      overlays = [
+        (import rust-overlays)
+      ];
+      pkgs = import nixpkgs {
+        inherit system overlays;
+        config.allowUnfree = true;
+      };
+
+      rust-override = {
+        extensions = ["rust-src" "rust-analyzer" "miri"];
+        targets = [ "x86_64-unknown-linux-gnu" ];
+      };
+
+      rust-pkg = pkgs.rust-bin.nightly.latest.default.override rust-override;
+    in with pkgs; {
+      devShells = {
+        default = mkShell rec {
+          name = "rust-osdev";
+
+          nativeBuildInputs = [
+            pkg-config
+            rust-pkg
+            clang
+            gcc
+            mold
+
+            qemu
+            OVMF
+            mtools
+          ];
+
+          buildInputs = [
+            udev stdenv.cc.cc.lib
+          ];
+
+          LD_LIBRARY_PATH = lib.makeLibraryPath buildInputs;
+          OVMF_PATH = OVMF.fd;
+        };
+      };
+    });
+}