You can use Stack and the Stackage snapshots with GHC 7.10.3
right now!
By default (since v0.1.4), Stack insists that the minor version
of GHC matches the version that was used to build the Stackage
snapshot. This means that using the current LTS 3.x and nightly
snapshots will require GHC 7.10.2, even if GHC 7.10.3 is installed
(as this is the safest option for reproducability). However, this
behaviour can be changed using the
compiler-check option. Just add the following to your project's
stack.yaml, or to ~/.stack/config.yaml
(if you prefer it to apply to all projects):
compiler-check: newer-minor
Then, install GHC 7.10.3:
$ stack setup 7.10.3
Now stack build and related subcommands will use
GHC 7.10.3.
Related: as soon as possible (i.e. the snapshot builds
successfully and passes tests), new Stackage nightly snapshots will
require GHC 7.10.3. If possible, newer LTS 3.x snapshots will also
be moved to GHC 7.10.3 (see fpco/stackage#1029).
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