Remixing a project works - it sounds like you got unlucky remixing a project that doesn’t. If you provide the project name then I can look into the specific issue. But Meteor doesn’t work in HyperDev yet - the filesystem isn’t writeable (except at /tmp) at run time so it can’t setup properly. This will be resolved with some changes we’re making. But otherwise, HyperDev provides a Node.js environment and whilst the welcome project uses Express, you can use pretty much any package you find on npm.