message: linux requirements
diff: @@ -103,6 +103,7 @@ Install dependencies:
  * Install [NodeJS](https://nodejs.org/).
  * Install [Yarn](https://yarnpkg.com/en/docs/install). If you're used to NPM, see "[Migrating from NPM](https://yarnpkg.com/lang/en/docs/migrating-from-npm/)". If you were already using NPM with DIM, run `yarn` to convert to Yarn. **Note (2018/4/25): Yarn from Homebrew will come with NodeJS 10, which isn't ready for prime time. Either install via `npm install -g yarn` or downgrade Node after installing.**
  * Windows-based developers will need to install `windows-build-tools` (`yarn global add windows-build-tools`) globally prior to running `yarn install`. Refer to issue #1439 for [details](https://github.com/DestinyItemManager/DIM/issues/1439).
  +* Linux-based developers will need to install `build-essential` (`sudo apt-get install -y build-essential`) prior to runninng `yarn install`.
  * Run `yarn install`.
  * Note that on Windows, the Git Bash shell may fail to fetch all necessary packages even when run as Admin ([details](https://github.com/DestinyItemManager/DIM/issues/2487)). If that's the case, simply use cmd as Admin instead.
  