Magento extension install - Dependancy error

Question

I am installing an extension I have written and published to the Magento Marketplace, but I get an error when installing from the store that makes no sense.

Check Component Dependency

We found conflicting component dependencies. Hide detail

Command "update" failed: Loading composer repositories with package information Updating dependencies (including require-dev) Your requirements could not be resolved to an installable set of packages.

Problem 1 - The requested package magento/product-community-edition could not be found in any version, there may be a typo in the package name. Problem 2 - Installation request for oddware/shipsterconnect 100.1.36 -> satisfiable by oddware/shipsterconnect[100.1.36]. - oddware/shipsterconnect 100.1.36 requires magento/module-sales 100.1.* -> no matching package found.

Potential causes: - A typo in the package name - The package is not available in a stable-enough version according to your minimum-stability setting see https://getcomposer.org/doc/04-schema.md#minimum-stability for more details.

Read https://getcomposer.org/doc/articles/troubleshooting.md for further common problems.

For additional assistance, see component dependency help .

I don't understand what the error about the community module is at all, it makes no sense and is not in my composer.json. And the module-sales makes even less sense, as that module is installed;

"magento/module-sales Magento_Sales 100.1.8"

And this is the composer.json in my extension;

{
  "name": "oddware/shipsterconnect",
  "description": "Oddware module for exporting to Shipster",
  "require": {
    "php": "~5.0|~6.0|~7.0",
    "magento/module-sales": "~100.0|~101.0",
    "magento/module-shipping": "~100.0",
    "magento/module-backend": "~100.0"
  },
  "type": "magento2-module",
  "version": "100.1.37",
  "repositories": [
    {
      "type": "composer",
      "url": "https://repo.magento.com/"
    }
  ],
  "license": [
    "OSL-3.0",
    "AFL-3.0"
  ],
  "autoload": {
    "files": [
      "registration.php"
    ],
    "psr-4": {
      "OddWare\\ShipsterConnect\\": ""
    }
  }
}

Answer 1

Adding:

"repositories": [
  {
    "type": "composer",
    "url": "https://repo.magento.com/"
  }
],

in your module's composer should do the job.