"alternative-layout-rule" did not exist on "master"

GHCi can't load Text.Printf

I'm using the binary distribution.

I have no trouble to load e.g. Text.PrettyPrint. However, Text.Printf can't be found. Here's part of a GHCi session:

Prelude> :m Text.PrettyPrint
Prelude Text.PrettyPrint> :m Text.Printf
can't find module `Text.Printf'
Prelude Text.PrettyPrint>

Running Setup.lhs of Happy also causes this error:

$ ./Setup.lhs
./Setup.lhs:
    Can't find module `Text.Printf'
    (use -v to see a list of the files searched for)

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