I'm installing a code base which is created by others, then i remove the old when i run "composer install" and encounter show many this kind of error message.

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Anyone know what is the problem?

2 Answers 2


Try to execute

composer install -vvv

this will give you more information. In our case the issue was "patch command not found", so we installed the patch and it works for us.

  • Any documentation for this -vvv param? Commented Jun 4, 2021 at 0:05
  • 1
    @NickRolando -v means verbose output for many Linux applications. -vvv just means triple verbose which outputs the most amount of information.
    – Zankar
    Commented Feb 14, 2022 at 12:16

Some of the time problem maybe OS does not have patch module install. So try this :

sudo yum install patch

can solve this problem sometime.

  • Thanks, this issue comes from the fact that some Linux distros do not come with preinstalled patch.
    – vladPavlov
    Commented Aug 10, 2021 at 16:50
  • This could be a valid reason especially if you are using Linux flavors like Amazon Linux which does not ship with patch pre-installed.
    – Nafsin Vk
    Commented Dec 14, 2023 at 8:49

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