PHP Notice: Undefined index: hash, ERROR: mismatched hash

[mallorydxw]

core@workshop /workbench/src/twinkie.dxw.net/dclg-intranet/app [hotfix/6263]
% whippet deps update
[...]
[Updating plugins/akismet]
[...]
PHP Notice:  Undefined index: hash in /workbench/src/github.com/dxw/whippet/src/Files/WhippetLock.php on line 18
PHP Stack trace:
PHP   1. {main}() /workbench/src/github.com/dxw/whippet/bin/whippet:0
PHP   2. RubbishThorClone->start() /workbench/src/github.com/dxw/whippet/bin/whippet:26
PHP   3. Dxw\Whippet\Whippet->deps() /workbench/src/github.com/dxw/whippet/vendor/dxw/rubbishthorclone/rubbish_thor_clone.class.php:69
PHP   4. Dxw\Whippet\Whippet->dependencies() /workbench/src/github.com/dxw/whippet/src/Whippet.php:88
PHP   5. RubbishThorClone->start() /workbench/src/github.com/dxw/whippet/src/Whippet.php:83
PHP   6. Dxw\Whippet\Modules\Dependencies->update() /workbench/src/github.com/dxw/whippet/vendor/dxw/rubbishthorclone/rubbish_thor_clone.class.php:69
PHP   7. Dxw\Whippet\Dependencies\Installer->install() /workbench/src/github.com/dxw/whippet/src/Modules/Dependencies.php:52
PHP   8. Dxw\Whippet\Dependencies\Installer->loadWhippetFiles() /workbench/src/github.com/dxw/whippet/src/Dependencies/Installer.php:17
PHP   9. Dxw\Whippet\Files\WhippetLock->getHash() /workbench/src/github.com/dxw/whippet/src/Dependencies/Installer.php:55
ERROR: mismatched hash - run `whippet dependencies update` first