Can't install laravel packages, symfony/process has wrong version

Question

I tried to install some packages that need a 2.* version but the new laravel version uses 3.*

Is there any way to "downgrade" the package or do I have to wait until the packages are updated to the latest version?

Answer 1

I had the same issue, when I wanted to install sclable/php-latex. It needed symfony process higher than 2.7. Installed was version 3.x. I thought, everything should be fine, but it did not work.

You just have to modify your composer.json file and set the version higher than 2.

"symfony/process": "^2.7"

as here my composer.json file

{
  "name": "laravel/laravel",
  "description": "The Laravel Framework.",
  "keywords": [ "framework", "laravel" ],
  "license": "MIT",
  "type": "project",
  "minimum-stability": "beta",
  "prefer-stable": true,
  "require": {
    "php": ">=5.5.9",
    "laravel/framework": "5.2.*",
    "barryvdh/laravel-debugbar": "^2.2",
    "symfony/process": "^2.7",
    "sclable/php-latex": "0.*",
    "anahkiasen/former": "^4.0"
  },
  "require-dev": {
    "fzaninotto/faker": "~1.4",
    "mockery/mockery": "0.9.*",
    "phpunit/phpunit": "~4.0",
    "symfony/css-selector": "2.8.*|3.0.*",
    "symfony/dom-crawler": "2.8.*|3.0.*"
  },

Then make an composer update:

composer update -verbose