yarn-error.log

Arguments: 
  /Users/swyx/.nvm/versions/node/v10.13.0/bin/node /usr/local/Cellar/yarn/1.17.0/libexec/bin/yarn.js add @ssgjs/plugin-yaml

PATH: 
  /Users/swyx/.wasmer/bin:/Users/swyx/.wasmer/globals/wapm_packages/.bin:/Users/swyx/.netlify/helper/bin:/Users/swyx/bin:/usr/local/bin:/Users/swyx/Library/Python/2.7/bin:/Users/swyx/ANT_HOME/bin:/Users/swyx/jython2.7.0/bin:/Users/swyx/.wasmer/bin:/Users/swyx/.wasmer/globals/wapm_packages/.bin:/Users/swyx/.netlify/helper/bin:/Users/swyx/.nvm/versions/node/v10.13.0/bin:/Users/swyx/bin:/usr/local/bin:/Users/swyx/Library/Python/2.7/bin:/Users/swyx/ANT_HOME/bin:/Users/swyx/jython2.7.0/bin:/Library/Frameworks/Python.framework/Versions/3.7/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin

Yarn version: 
  1.17.0

Node version: 
  10.13.0

Platform: 
  darwin x64

Trace: 
  Error: https://registry.yarnpkg.com/@ssgjs%2fplugin-yaml: Not found
      at Request.params.callback [as _callback] (/usr/local/Cellar/yarn/1.17.0/libexec/lib/cli.js:66823:18)
      at Request.self.callback (/usr/local/Cellar/yarn/1.17.0/libexec/lib/cli.js:140439:22)
      at Request.emit (events.js:182:13)
      at Request.<anonymous> (/usr/local/Cellar/yarn/1.17.0/libexec/lib/cli.js:141411:10)
      at Request.emit (events.js:182:13)
      at IncomingMessage.<anonymous> (/usr/local/Cellar/yarn/1.17.0/libexec/lib/cli.js:141333:12)
      at Object.onceWrapper (events.js:273:13)
      at IncomingMessage.emit (events.js:187:15)
      at endReadableNT (_stream_readable.js:1094:12)
      at process._tickCallback (internal/process/next_tick.js:63:19)

npm manifest: 
  {
    "name": "community",
    "version": "1.0.0",
    "main": "index.js",
    "repository": "https://github.com/sveltejs/community.git",
    "author": "sw-yx <swyx@dontemail.me>",
    "license": "MIT",
    "dependencies": {
      "@sveltejs/site-kit": "^1.1.4",
      "ssg": "^0.0.38",
      "yaml": "^1.7.1"
    },
    "scripts": {
      "start": "ssg dev",
      "build": "ssg export"
    }
  }

yarn manifest: 
  No manifest

Lockfile: 
  No lockfile