Option 1: Datapack (.zip) — recommended

1. Download the ZIP file — do not extract it!
2. Copy the ZIP into your world folder:
   %appdata%\.minecraft\saves\YOUR_WORLD\datapacks\
3. Launch Minecraft and load your world (or type /reload).
4. Stand at the desired position and run:
   /function PACKNAME:build
5. The building will appear relative to your position! 🏗️

Option 2: .mcfunction (single file)

1. Download the .mcfunction file.
2. Copy it to:
   %appdata%\.minecraft\saves\YOUR_WORLD\datapacks\YOUR_PACK\data\NAMESPACE\function\
3. Create a datapack with a pack.mcmeta if needed.
4. Use /reload then /function namespace:filename.