Followed installation instructions:
composer create-project flarum/flarum . --stability=beta
composer require rodymolenaar/flarum-ext-dutch
and got
Your requirements could not be resolved to an installable set of packages.
Problem 1
- Installation request for flarum/core (locked at v0.1.0-beta.6, required as ^0.1.0) -> satisfiable by flarum/core[v0.1.0-beta.6].
- rodymolenaar/flarum-ext-dutch v1.1.0 requires flarum/core ^0.1.0-beta.7 -> satisfiable by flarum/core[v0.1.0-beta.7].
- rodymolenaar/flarum-ext-dutch v1.1.1 requires flarum/core ^0.1.0-beta.7 -> satisfiable by flarum/core[v0.1.0-beta.7].
- Conclusion: don't install flarum/core v0.1.0-beta.7
- Installation request for rodymolenaar/flarum-ext-dutch ^1.1 -> satisfiable by rodymolenaar/flarum-ext-dutch[v1.1.0, v1.1.1].
Update: ah, the Flarum installation instructions are outdated. I got it to work by running composer update