first commit

.github/workflows/build_nix.yml

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+name: "Build legacy Nix package on Ubuntu"
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: https://github.com/actions/checkout@v4
+
+      - name: Install sudo
+        run: apt update && apt install sudo
+
+      - uses: https://github.com/cachix/install-nix-action@v30
+        with:
+          nix_path: nixpkgs=channel:nixos-unstable
+
+      - name: Building package
+        run: nix build