Clear-compiled fails with google/apiclient

I'm trying to deploy my application which uses the official google apiclient. When composer install triggers the artisan clear-compiled command I get an error:

  [Google_Auth_Exception]
  Unable to parse the p12 file.  Is this a .p12 file?  Is the password correct?  OpenSSL error:

Script php artisan clear-compiled handling the post-install-cmd event returned with an error
  [RuntimeException]
  Error Output:

I'm out of idea's why this happens. Anyone any idea?