I am testing Magento 2.2 RC with snowdogapps/magento2-theme-blank-sass. However, when running composer require snowdog/theme-blank-sass I see this problem:
snowdog/theme-blank-sass 0.10.1 requires magento/framework 100.1.* -> no matching package found.
As of today, Magento 2.2 RC comes with magento/framework 100.2.0-dev
It seems the theme currently doesn't support Magento 2.2.
You can see the available versions on the readme file https://github.com/SnowdogApps/magento2-theme-blank-sass
Maybe you can create an issue https://github.com/SnowdogApps/magento2-theme-blank-sass/issues to report this situation.
Same issue with Magento 2.2.0 and snowdog/theme-blank-sass[1.0.0].
- Installation request for snowdog/theme-blank-sass ^1.0 -> satisfiable by snowdog/theme-blank-sass[1.0.0].
- snowdog/theme-blank-sass 1.0.0 requires magento/framework ^100.2.0 -> no matching package found.
but in readme.md (https://github.com/SnowdogApps/magento2-theme-blank-sass):
Magento 2.2: v1.0.0 or later
Maybe you can create an issue on the project? https://github.com/SnowdogApps/magento2-theme-blank-sass/issues
Sorry about that, I was releasing it late and didn't test this part well.
It's already fixed and released as v1.0.1.