Example app fails to build due to css processing error

[arctica]

When creating an example app via snel create myapp and then running trex run build it will fail with the follow output:

$ trex run build
preparing files for production.

Entry public/__index.html
Error: public/global.css: R.default.comma is not a function
    at CssPlugin.createAsset (https://deno.land/x/[email protected]/plugins/css/css.ts:87:13)
    at async Bundler.createAsset (https://deno.land/x/[email protected]/bundler.ts:155:23)
    at async Bundler.createGraph (https://deno.land/x/[email protected]/bundler.ts:251:17)
    at async Bundler.bundle (https://deno.land/x/[email protected]/bundler.ts:621:19)
    at async Dist (https://deno.land/x/[email protected]/src/cli/prepare.ts:54:23)
    at async Build (https://deno.land/x/[email protected]/src/cli/commands/build.ts:33:5)
    at async Object.build (https://deno.land/x/[email protected]/cli.ts:52:42)
    at async Main (https://deno.land/x/[email protected]/cli.ts:99:14)
    at async https://deno.land/x/[email protected]/cli.ts:138:3

I narrowed it down to the following css rule, the parens seem to be the issue.

button:not(:disabled):active {
  background-color: #ddd;
}

This is probably a bug in "Deno Bundler" but that github repo does not have issues enabled and the original that it was forked from seems to not be maintained anymore. I'm not sure what can be done in this case. Are there maybe alternatives to "Deno Bundler"?