Thanks for responding.

I’m using the latest master of ElixirLS and have this in my ~/.doom.d/config.el

(setq lsp-clients-elixir-server-executable "~/code/tools/elixir-ls/release/language_server.sh")
(add-hook 'before-save-hook (lambda () (when (eq 'elixir-mode major-mode)
                                         (lsp-format-buffer))))

I have yasnippet installed and yasnippet-minor-mode is enabled. When I run yas-insert-snippet I get the output I prefer. However, lsp-mode is picking the snippets from ElixirLS by default (see screenshot below). I do notice there’s a tab in those snippet definitions. But that doesn’t seem to be an issue in VS Code, only in Emacs.

Screen Shot 2020-08-19 at 11.58.23 AM1466×520 101 KB

I’ve looked around for a way to force lsp-mode to prefer yasnippets, but haven’t hit upon the right config just yet. It’s not so bad, since I’m formatting the buffer on save - and I save a lot.