Not fully working as intended

[ghost]

When I run this command for my react-native project it seems to work, however, I've committed my code to github and then checked out a clean copy. After this it is not runnable with 'npm install' alone; I still need to run 'yarn install' and then go through the process of running deyarn. I'm not sure where exactly the issue is here but I thought I would at least raise an issue as this command is not working as intended for me.