return {
    -- Mason.
    {
        "williamboman/mason.nvim",
        config = function()
            require("mason").setup()
        end,
    },
    -- Mason LSP Config.
    {
        "williamboman/mason-lspconfig.nvim",
        dependencies = { "neovim/nvim-lspconfig" },
        config = function()
            require("mason-lspconfig").setup({
                ensure_installed = {
                    "clangd", "neocmake", "jdtls", "ts_ls", "lua_ls",
                    "pyright", "omnisharp", "html", "cssls", "glsl_analyzer",
                    "biome", "somesass_ls", "ocamllsp", "rust_analyzer",
                },
            })
            require("mason-lspconfig").setup_handlers({
                function(server_name)
                    if server_name == "ocamllsp" then
                        require("lspconfig").ocamllsp.setup({
                            capabilities = require("cmp_nvim_lsp").default_capabilities(),
                            root_dir = function()
                                return vim.loop.cwd()
                            end,
                        })
                    else
                        require("lspconfig")[server_name].setup({
                            capabilities = require("cmp_nvim_lsp").default_capabilities(),
                        })
                    end
                end,
            })
        end,
    },
}