Alpha1 - Build return error "[UnexpectedValueException] Unknown package has no name defined"

Hi all
I've got this problem after (wrongly) run composer update

Quick recap
I had a working satis on an internal server that is still running php 5.4, that cannot be updated atm.
Yesterday I wrongly run composer update and of course satis was not working anymore.

I managed to recover the "old" composer.lock to run a composer install, but I started having the issue in subject.

I've tried to install a new satis environment using alpha1
`composer create-project composer/satis:1.0.0-alpha1`
and the same configuration-file used in the past (nothing changed in it)

I've found this https://github.com/composer/composer/pull/1899 but I can't relate it to my issue.
I'm almost sure that I'm missing something stupid, some dependencies that was updated, something using wrong/newer version, but I can't find what.
Does anyone have any clue ?

Tnx

Below the configuration-file and the composer.json from the fresh install
```
{
"name": "TEST",
"homepage": "https://test.test.it",

"repositories": [
{ "type": "vcs", "url": "https://git.test.it/plesk-git/my-package/"},
{ "type": "composer", "url": "https://packagist.org" }
],
"archive": {
"directory": "packages",
"format": "zip",
"prefix-url": "https://test.test.it",
},
"require": {
"test/my-package": "*"
},
"require-dependencies": false,
"config": {
"preferred-install": "dist"
}
}

```

```
{
"name": "composer/satis",
"description": "Simple Repository Generator",
"keywords": ["package", "repository", "generator"],
"homepage": "https://github.com/composer/satis",
"type": "library",
"license": "MIT",
"authors": [
{
"name": "Jordi Boggiano",
"email": "j.boggiano@seld.be",
"homepage": "http://seld.be"
},
{
"name": "Nils Adermann",
"email": "naderman@naderman.de",
"homepage": "http://www.naderman.de"
}
],
"bin": ["bin/satis"],
"require": {
"php": ">=5.3.2",
"composer/composer": "1.0.*@dev",
"twig/twig": "~1.7",
"symfony/console": "~2.1"
},
"autoload": {
"psr-0": { "Composer\\Satis": "src/" }
}
}
```

Start by reproducing the failure with `composer create-project composer/satis:1.0.0-alpha1` and the supplied configuration file on the reported PHP 5.4 environment. Then inspect the fresh-install `composer.json` and recovered `composer.lock` to identify which package metadata triggers the `Unknown package has no name defined` exception. Done means the cause is isolated and the build completes with the existing configuration.

Written by the indexing model from the issue text.