automatic_installation still installs servers when set to false

[perrylets]

NVIM v0.10.2
Build type: Release
LuaJIT 2.1.1713773202

Mason commit: e2f7f90
Mason lspconfig commit: 8e46de9

local M = {
  {
    "neovim/nvim-lspconfig",
    dependencies = {
      { "williamboman/mason.nvim", opts = {} },
      "williamboman/mason-lspconfig.nvim",
      "hrsh7th/cmp-nvim-lsp",
      {
        "folke/lazydev.nvim",
        ft = "lua",
        opts = {
          library = {
            { path = "luvit-meta/library", words = { "vim%.uv" } },
          },
        },
      },
      { "Bilal2453/luvit-meta", lazy = true },
    },
    config = function()
      local ensure_installed = { "lua_ls", "tinymist", "ts_ls", "rust_analyzer", "marksman", "ols", "jsonls" }

      local lsp = require("lspconfig")
      local default_capabilities = require("cmp_nvim_lsp").default_capabilities()
      vim.g.debug_mason_lsp_setup = {
        ensure_installed = ensure_installed,
        automatic_installation = not vim.uv.fs_stat("/etc/NIXOS"),
        handlers = {
          function(server)
            lsp[server].setup({ capabilities = default_capabilities })
          end,
        },
      }
      require("mason-lspconfig").setup(vim.g.debug_mason_lsp_setup)
      vim.print(vim.g.debug_mason_lsp_setup.automatic_installation)
-- ...

The value printed in the last line of the snippet is false, but all the language servers are being installed after I uninstall them.

I'm running on nixos-wsl and the file /etc/NIXOS exists.