Unnecessary downloads

[DanBurton]

bash> stk install wai-app-static
Downloading attoparsec-0.11.3.4
Downloading iproute-1.4.0
Resolving dependencies...
All the requested packages are already installed:
wai-app-static-3.0.1

I don't understand why it downloaded those two things if it was (and they were) already installed. Furthermore, it downloaded an older attoparsec than what I have (0.12.1.6), while also downloading a newer iproute than what I have (1.3.2). This was done with an lts-2.5 shared sandbox, with a cabal.config present which should have guided the install constraints to select versions that I already have.