small changes

nvim/files/lua/plugins/conform.lua

@@ -32,6 +32,16 @@ return {
 			end,
 		})
 
+		-- Nix files use spaces (2) to match alejandra formatter
+		vim.api.nvim_create_autocmd("FileType", {
+			pattern = "nix",
+			callback = function()
+				vim.bo.expandtab = true
+				vim.bo.shiftwidth = 2
+				vim.bo.tabstop = 2
+			end,
+		})
+
 		vim.api.nvim_create_user_command("Format", function(args)
 			local range = nil
 			if args.count ~= -1 then