Google says it’s moving Nest devices over to a unified Google ecosystem for the sake of simplicity. But simple can be complicated, as is certainly the case here. In May, after user pushback, the company announced that it would maintain Works with Nest connections for some third-party integration.

IFTTT’s popular applets for the company’s camera, smoke detector and thermostat are among those exceptions. That certainly bodes well for those user who took the time to ingrate IFTTT functionality.

However, users who opt to migrate a Nest account to a Google one will apparently break their connections in the process. The organize issued a dual warning late last night, following a migration blog post encouraging users to migrate.

Per IFTTT,

Do not migrate your Nest account to a Google account. Migrating your Nest account will cause IFTTT and other Works with Nest integrations to be disconnected. This process is not reversible.

Do not disconnect Nest from IFTTT after August 31st as you will not be able to reconnect it. This affects users that do not migrate their Nest accounts to a Google one.

For its part, Google says it’s looking to bring similar automation functionality to Nest that presently requires third-party integration from services like IFTTTT.