sentry 8.20.0 on heroku: Cannot find node executable

[robinboening]

I am trying to get the current sentry release 8.20.0 running on heroku.

It was working with the older versions, but with this I get an error to install node (see backtrace).

Any ideas how to solve this?

remote:          Running setup.py develop for sentry
remote:            Complete output from command /app/.heroku/python/bin/python -c "import setuptools, tokenize;__file__='/app/.heroku/src/sentry/setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" develop --no-deps:
remote:            running develop
remote:            running egg_info
remote:            writing requirements to src/sentry.egg-info/requires.txt
remote:            writing src/sentry.egg-info/PKG-INFO
remote:            writing top-level names to src/sentry.egg-info/top_level.txt
remote:            writing dependency_links to src/sentry.egg-info/dependency_links.txt
remote:            writing entry points to src/sentry.egg-info/entry_points.txt
remote:            reading manifest file 'src/sentry.egg-info/SOURCES.txt'
remote:            reading manifest template 'MANIFEST.in'
remote:            warning: no files found matching 'src/sentry/assets.json'
remote:            warning: no files found matching '*.json' under directory 'src/sentry/integration-docs'
remote:            writing manifest file 'src/sentry.egg-info/SOURCES.txt'
remote:            running build_ext
remote:            Creating /tmp/build_8f1d5fab60be2b61c24fdb3a7be9fde7/.heroku/python/lib/python2.7/site-packages/sentry.egg-link (link to src)
remote:            Adding sentry 8.20.0 to easy-install.pth file
remote:            Installing sentry script to /app/.heroku/python/bin
remote:
remote:            Installed /app/.heroku/src/sentry/src
remote:            running build_integration_docs
remote:            initializing git submodules
remote:            command failed [node --version] via [/app/.heroku/src/sentry]
remote:            Cannot find `node` executable. Please install node` and try again.

Thanks for your help!

Robin