Example of aptdaemon not updating dependencies on Saucy. Is this broken behaviour, or are my expectations to blame?

gistfile1.py

import aptdaemon.client

def printcall(*args, **kwargs):
    print("call(*%r, **%r)" % (args, kwargs))

client = aptdaemon.client.AptClient()
# I have make installed, but not abiword.
txn = client.install_packages(["make", "abiword"])
txn.connect("dependencies-changed", printcall)
txn.simulate()

print(txn.dependencies)
print(txn.packages)