The package is not available in a stable-enough version according to your minimum-stability setting

Question

I don\'t really understand how Composer works with the minimum-stability setting.

I have two packages. Let\'s say, PackageA and PackageB.

Answer 1

There are two issues:

In create-project, by default the command uses the stable stability to look for the package to install, that's why it works if you specify dev-master but not by default. You could however also run composer create-project vendor/packagea -s dev

After while installing dependencies, I'm guessing that your package does not exist in a version just called dev, so it can't find it if you require it like that. Requiring dev-master would probably work, like:

{
    "name": "vendor/packagea",
    "minimum-stability": "dev",
    "require": {
        "vendor/packageb": "dev-master"
    }
}