Add Nix flake

.envrc

@@ -0,0 +1 @@
+use flake

.github/workflows/evaluate-nix.yml

@@ -0,0 +1,24 @@
+name: evaluate-nix
+
+on:
+  push:
+    branches:
+      - '*'
+    tags:
+      - '*'
+  pull_request:
+  workflow_dispatch:
+
+jobs:
+  check:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v6
+      - name: Install Nix
+        uses: DeterminateSystems/determinate-nix-action@v3
+      - name: Run the Magic Nix Cache
+        uses: DeterminateSystems/magic-nix-cache-action@v14
+        with:
+          use-flakehub: false
+      - name: Check evaluation, also builds the package
+        run: nix flake check

.gitignore

@@ -30,6 +30,8 @@ Session.vim
 .cargo
 # Included because it is part of the test case
 !/tests/run-make/thumb-none-qemu/example/.cargo
+.direnv
+.pre-commit-config.yaml
 
 ## Configuration
 /config.toml
@@ -54,6 +56,7 @@ build/
 /src/tools/x/target
 # Created by default with `src/ci/docker/run.sh`
 /obj/
+/result
 
 ## Temporary files
 *~
@@ -81,4 +84,4 @@ package.json
 ## Rustdoc GUI tests
 tests/rustdoc-gui/src/**.lock
 
-# Before adding new lines, see the comment at the top.
+# Before adding new lines, see the comment at the top.