Illegal instruction when using beta inside Docker

[npezza93]

What version of Tailwind CSS are you using?

v4 beta 2

What build tool (or framework if it abstracts the build tool) are you using?

docker and ruby

What version of Node.js are you using?

🤷

What browser are you using?

For example: N/A

What operating system are you using?

linux

Reproduction URL

Dockerfile

# syntax=docker/dockerfile:1
# check=error=true

ARG RUBY_VERSION=3.4.0-preview2
FROM docker.io/library/ruby:$RUBY_VERSION-slim AS base

RUN apt-get update -qq && \
    apt-get install --no-install-recommends -y curl build-essential git pkg-config && \
    rm -rf /var/lib/apt/lists /var/cache/apt/archives

RUN curl -L -o bin/tailwindcss https://github.com/tailwindlabs/tailwindcss/releases/download/v4.0.0-beta.2/tailwindcss-linux-x64 && \
    chmod a+x ./bin/tailwindcss

RUN ./bin/tailwindcss --help

command: docker buildx build --platform linux/amd64 --file Dockerfile.tw .
Describe your issue

When trying to execute the beta executable in x86 for linux, it errors with '0.054 Illegal instruction'