$ heroku stack -a zundan-mastodon-staging-pr-6 | grep \*
* heroku-16
$ heroku run bash -a zundan-mastodon-staging-pr-6
~ $ npm start

> mastodon@ start /app
> node ./streaming/index.js

/app/node_modules/uws/uws.js:38
            throw new Error('Compilation of µWebSockets has failed and there is no pre-compiled binary ' +
            ^

Error: Compilation of µWebSockets has failed and there is no pre-compiled binary available for your system. Please install a supported C++11 compiler and reinstall the module 'uws'.
    at native (/app/node_modules/uws/uws.js:38:19)
    at Object.<anonymous> (/app/node_modules/uws/uws.js:42:3)
    at Module._compile (internal/modules/cjs/loader.js:678:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:689:10)
    at Module.load (internal/modules/cjs/loader.js:589:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:528:12)
    at Function.Module._load (internal/modules/cjs/loader.js:520:3)
    at Module.require (internal/modules/cjs/loader.js:626:17)
    at require (internal/modules/cjs/helpers.js:20:18)
    at Object.<anonymous> (/app/streaming/index.js:10:19)
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! mastodon@ start: `node ./streaming/index.js`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the mastodon@ start script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     /app/.npm/_logs/2018-05-14T19_57_28_066Z-debug.log
~ $ cat /app/.npm/_logs/2018-05-14T19_57_28_066Z-debug.log
0 info it worked if it ends with ok
1 verbose cli [ '/app/.heroku/node/bin/node',
1 verbose cli   '/app/.heroku/node/bin/npm',
1 verbose cli   'start' ]
2 info using [email protected]
3 info using [email protected]
4 verbose config Skipping project config: /app/.npmrc. (matches userconfig)
5 verbose run-script [ 'prestart', 'start', 'poststart' ]
6 info lifecycle mastodon@~prestart: mastodon@
7 info lifecycle mastodon@~start: mastodon@
8 verbose lifecycle mastodon@~start: unsafe-perm in lifecycle true
9 verbose lifecycle mastodon@~start: PATH: /app/.heroku/node/lib/node_modules/npm/node_modules/npm-lifecycle/node-gyp-bin:/app/node_modules/.bin:/app/bin:/app/vendor/bundle/bin:/app/vendor/bundle/ruby/2.5.0/bin:/app/.heroku/node/bin:/app/.heroku/yarn/bin:/app/.apt/usr/bin:/usr/local/bin:/usr/bin:/bin:/app/bin:/app/node_modules/.bin
10 verbose lifecycle mastodon@~start: CWD: /app
11 silly lifecycle mastodon@~start: Args: [ '-c', 'node ./streaming/index.js' ]
12 silly lifecycle mastodon@~start: Returned: code: 1  signal: null
13 info lifecycle mastodon@~start: Failed to exec start script
14 verbose stack Error: mastodon@ start: `node ./streaming/index.js`
14 verbose stack Exit status 1
14 verbose stack     at EventEmitter.<anonymous> (/app/.heroku/node/lib/node_modules/npm/node_modules/npm-lifecycle/index.js:285:16)
14 verbose stack     at EventEmitter.emit (events.js:182:13)
14 verbose stack     at ChildProcess.<anonymous> (/app/.heroku/node/lib/node_modules/npm/node_modules/npm-lifecycle/lib/spawn.js:55:14)
14 verbose stack     at ChildProcess.emit (events.js:182:13)
14 verbose stack     at maybeClose (internal/child_process.js:957:16)
14 verbose stack     at Process.ChildProcess._handle.onexit (internal/child_process.js:246:5)
15 verbose pkgid mastodon@
16 verbose cwd /app
17 verbose Linux 4.4.0-1014-aws
18 verbose argv "/app/.heroku/node/bin/node" "/app/.heroku/node/bin/npm" "start"
19 verbose node v10.1.0
20 verbose npm  v5.6.0
21 error code ELIFECYCLE
22 error errno 1
23 error mastodon@ start: `node ./streaming/index.js`
23 error Exit status 1
24 error Failed at the mastodon@ start script.
24 error This is probably not a problem with npm. There is likely additional logging output above.
25 verbose exit [ 1, true ]
~ $ cat Aptfile 
ffmpeg
libicu[0-9][0-9]
libicu-dev
libidn11
libidn11-dev
libpq-dev
libprotobuf-dev
libssl-dev
libxdamage1
libxfixes3
protobuf-compiler
zlib1g-dev

3 info using [email protected]