platformsh failures

Validating submodules.
Validating configuration files.
Processing activity: **Lucas Hedding** pushed to **Master**
    Found 3 new commits.

    Building application 'drupal' (runtime type: php:7.0, tree: 4cfdf59)
      Generating runtime configuration.
      
      Installing build dependencies...
        Installing php build dependencies: drush/drush, composer/composer
      
      Found a `composer.json`, installing dependencies.
      
        E: Command exited with error code 1. Output follows:
          Loading composer repositories with package information
          Installing dependencies (including require-dev) from lock file
            - Installing cweagans/composer-patches (1.4.0)
              Loading from cache
          
          Gathering patches for root package.
          Gathering patches for dependencies. This might take a minute.
            - Installing composer/installers (v1.0.25)
              Loading from cache
          
            - Installing commerceguys/enum (v1.0)
              Loading from cache
          
            - Installing commerceguys/intl (dev-master 94a1f8f)
              Loading from cache
          
            - Installing doctrine/collections (v1.3.0)
              Loading from cache
          
            - Installing commerceguys/addressing (dev-master 93ddf17)
              Loading from cache
          
            - Installing commerceguys/zone (dev-master 1a690b7)
              Loading from cache
          
            - Installing composer/semver (1.4.0)
              Loading from cache
          
          
                                                                                                                                          
            [InvalidArgumentException]                                                                                                    
            Unknown downloader type: drupal-library. Available types: git, svn, hg, perforce, zip, rar, tar, gzip, xz, phar, file, path.  
                                                                                                                                          
          
          install [--prefer-source] [--prefer-dist] [--dry-run] [--dev] [--no-dev] [--no-plugins] [--no-custom-installers] [--no-autoloader] [--no-scripts] [--no-progress] [-v|vv|vvv|--verbose] [-o|--optimize-autoloader] [-a|--classmap-authoritative] [--ignore-platform-reqs] [--] [<packages>]...
          
      
      E: Error building project: `composer` could not be run. Aborted build.

    E: Error building the project: Unable to build project, aborting deployment.