Publish sail config so you can edit the dockerfile: php artisan sail:publish Dockerfile (changes in red - nano is optional) / project /8.0/Dockerfile FROM ubuntu: 20.04 LABEL maintainer= "Taylor Otwell" ARG WWWGROUP WORKDIR / var / www / html ENV DEBIAN_FRONTEND noninteractive ENV TZ =UTC RUN ln - snf / usr / share / zoneinfo / $ TZ / etc / localtime && echo $ TZ > / etc / timezone RUN apt-get update \ && apt-get install - y gnupg gosu curl ca-certificates zip unzip git supervisor sqlite3 libcap2-bin \ && mkdir - p ~ / .gnupg \ && echo "disable-ipv6" >> ~ / .gnupg / dirmngr.conf \ && apt-key adv -- homedir ~ / .gnupg -- keyserver hkp: // keyserver.ubuntu.com: 80 -- recv-keys E5267A6C \ && apt-key adv -- homedir ~ / .gnupg -- keyserver hkp: // keyserver.ubuntu.com: 80 -- recv-keys C300EE8C \ && echo "deb http://ppa.launchpad.net/ondrej/php/ubuntu focal main" ...