This buildpack installs shims that always add --headless, --disable-gpu, --no-sandbox, and --remote-debugging-port=9222 to any google-chrome command as you'll have trouble running Chrome on a Heroku dyno otherwise.

Shims are just tiny wrappers created by asdf that just forward execution to the real versioned executables installed by asdf. This way, asdf has a single shims directory added to your PATH and has no need of mangling the PATH for every installed version.

it propagates (Option -p) the returnlevel ($?) so you may use it for your purpose.

This is an ES5-only and un-shimmable feature, which is why Vue doesn’t support IE8 and below.

Write a wrapper script that sets the LD_LIBRARY_PATH environment variable.

Through a process called rehashing, rbenv maintains shims

Shims are lightweight executables that simply pass your command along to rbenv.