In FFA the force-app/deps directory is listed as part of sfdx-project.json but is not created until you run the ant prepare. This results in no watcher being setup for the directory since it does not exist.
A similar problem would occur if the directory did exist but was then removed and re-created. Also note that if a directory is re-named we should ideally stop watching it as its no longer of interest.
In FFA the force-app/deps directory is listed as part of sfdx-project.json but is not created until you run the ant prepare. This results in no watcher being setup for the directory since it does not exist.
A similar problem would occur if the directory did exist but was then removed and re-created. Also note that if a directory is re-named we should ideally stop watching it as its no longer of interest.