Neovim: How to override filetype with vim.filetype.add?

[JohnTheCoolingFan]

I am setting up neovim to have a custom filetype for files with a name `chaneglog.txt':

vim.filetype.add({
    filename = {
        ['changelog.txt'] = 'factorio-changelog'
    }
})

But when I open a changelog.txt file, the filetype property gets overriden to changelog by vim-polyglot. Disabling the plugin lets the above lua rule work. How can this be disabled? I've tried vim.g.polyglot_disable = {"changelog"} but it had no effect.

[JohnTheCoolingFan]

I have ended up disabling this plugin in favor of tree-sitter and filetype-specific plugins, although having support for more filetypes that won't clash with custom ones would be much better.