yarn-error.log

Arguments: 
  /Users/admin/.nvm/versions/node/v8.9.4/bin/node /usr/local/Cellar/yarn/1.5.1_1/libexec/bin/yarn.js remove @slack/client

PATH: 
  /Users/admin/go/bin/:/Users/admin/.nvm/versions/node/v8.9.4/bin:/Users/admin/.rbenv/shims:/usr/local/opt/rbenv/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin

Yarn version: 
  1.5.1

Node version: 
  8.9.4

Platform: 
  darwin x64

npm manifest: 
  {
    "name": "slack-docker",
    "version": "1.0.0",
    "description": "Slack integration for notifying Docker events",
    "repository": {
      "type": "git",
      "url": "https://github.com/int128/slack-docker.git"
    },
    "main": "app.js",
    "scripts": {
      "start": "node app.js"
    },
    "author": "int128",
    "license": "Apache-2.0",
    "dependencies": {
      "@slack/client": "^3.14.1",
      "dockerode": "^2.5.3",
      "immutable": "^3.8.2"
    }
  }

yarn manifest: 
  No manifest

Lockfile: 
  No lockfile

Trace: 
  Error: No lockfile in this directory. Run `yarn install` to generate one.
      at new MessageError (/usr/local/Cellar/yarn/1.5.1_1/libexec/lib/cli.js:186:110)
      at /usr/local/Cellar/yarn/1.5.1_1/libexec/lib/cli.js:89389:13
      at <anonymous>