Laravel Forge - Upgrading project to Laravel 8 needs PHP 7.4

I recently migrated a Forge-hosted project to Laravel 8.x. The deployment script fails when running composer install, all of the messages related to having the wrong PHP version:

Installing dependencies (including require-dev) from lock file  Your requirements could not be resolved to an installable set of packages.      Problem 1      - This package requires php ^7.4 but your PHP version (7.3.26) does not satisfy that requirement.    Problem 2      - Installation request for lcobucci/clock 2.0.0 -> satisfiable by lcobucci/clock[2.0.0].      - lcobucci/clock 2.0.0 requires php ^7.4 || ^8.0 -> your PHP version (7.3.26) does not satisfy that requirement.  ...  

I did this though.

At least according to the documentation. PHP 7.4 is selected in Meta > PHP Version for this site. In PHP Management, 7.4 is default and is updated to latest patch.

I restarted PHP, then Nginx, then the entire server, none of it worked.

Via SSH it is using 7.3.26:

forge@mistaken-identity:~$ php -v  PHP 7.3.26-1+ubuntu18.04.1+deb.sury.org+1 (cli) (built: Jan 13 2021 08:00:44) ( NTS )  Copyright (c) 1997-2018 The PHP Group  Zend Engine v3.3.26, Copyright (c) 1998-2018 Zend Technologies      with Zend OPcache v7.3.26-1+ubuntu18.04.1+deb.sury.org+1, Copyright (c) 1999-2018, by Zend Technologies  

Is Forge's PHP management API broken, or just on my server? I would like to be able to set PHP version on a per-site basis. How can I fix this?

https://stackoverflow.com/questions/65803848/laravel-forge-upgrading-project-to-laravel-8-needs-php-7-4 January 20, 2021 at 01:59PM