Huh.  I've just been assuming STM is a user land lib! Been installing it from hackage...

On Tuesday, February 18, 2014, Joachim Breitner <nomeata@debian.org> wrote:
Hi David,

Am Dienstag, den 18.02.2014, 14:12 -0800 schrieb David Fox:
> It seems to me that the stm library that is supposed to be built into
> ghc-7.8.1 is missing.  The deb provides and conflicts with
> libghc-stm-dev , but does not provide libghc-stm-dev-2.4.2.1-abcde.

this seems to be the result of a possible inadvertent change in the GHC
source tarball creation: stm had been a "extra" lib already in 7.6 and
before, but was not part of the tarball.

Herbert or Austin, is the sdist code not doing the right thing here?

Greetings,
Joachim

--
Joachim "nomeata" Breitner
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