[Haskell-beginners] Stack and packages not in the snapshot

[Michael Snoyman]

Your last paragraph is correct: stack will never automatically pull in a
package that's not explicitly added to your build plan (either via snapshot
or extra-deps), but if you run `stack build foo`, it will listen to you and
install it. The exact semantics of this are covered in:

https://github.com/commercialhaskell/stack/wiki/Build-command

On Mon, Aug 31, 2015 at 3:16 AM, Thomas Koster <tkoster at gmail.com> wrote:

> Good morning list,
>
> I have started to use stack with Stackage LTS for building my projects
> because I like the idea of a stable snapshot of packages known to work
> together.
>
> Then I tried to build "x509-util-1.5.2". This package fails to build
> and this is already known by upstream.
>
> And lo, "x509-util" is not in Stackage LTS 3.2, which makes sense.
>
> But what surprised me is that stack attempted to build a package not
> in the snapshot, when my resolver is "lts-3.2" (and no extra-deps).
>
> Is there a way to configure stack to build packages from the snapshot
> only? Or does it already work this way, only trying "x509-util"
> because *I* said "stack build x509-util"?
>
> Thanks in advance.
> --
> Thomas Koster
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