Specifying LSP capabilities

[Readf0x]

I am trying to set up the OCaml LSP, and it has a known issue with crashing when trying to generate function signatures on code with syntax errors. As you could imagine, this is a huge pain when you're typing, since neovim will constantly warn you about the LSP crashing. The only known fix is to just disable signatures entirely, however I've realized that the documentation doesn't make it very clear how to configure LSP capabilities. I tried using what was suggested for lspconfig:

require('lspconfig').ocamllsp.setup {
  handlers = {
    ["textDocument/signatureHelp"] = vim.lsp.with(vim.lsp.handlers.signature_help, { silent = true }),
  }
}

By making it into

ocamllsp = {
  enable = true;
  settings.handlers = { __raw = ''
    ["textDocument/signatureHelp"] = vim.lsp.with(vim.lsp.handlers.signature_help, { silent = true })
  '';};
};

As you could guess, this didn't work. What is the proper way to configure this?