allows to write neat expressions like (as we're still generating an
expression string):
```
{
build = haskellPackages.buildLocalCabalWithArgs {
inherit src name;
cabalDrvArgs = {
jailbreak = false;
doCheck = false;
};
};
}
```
without resorting to weird kung-fu like darcs does:
```
darcs = haskellPackages.darcs.override {
# A variant of the Darcs derivation that containts only the
# executable and
# thus has no dependencies on other Haskell packages.
cabal = { mkDerivation = x: rec { final = haskellPackages.cabal.mkDerivation (self: (x final) // {
isLibrary = false;
configureFlags = "-f-library"; }); }.final;
};
};
```
While here, move the `jailbreak = true;` as the default `cabalDrvArgs`
option.
The whole notion of per-compiler HP-compliant environments has failed
anyway and I'll try to get rid of that ASAP, so it feels pointless to
configure that stuff for GHC 7.8.2 to begin with.
These packages come with R, but if we install them as part of this build, then
we cannot update them without re-building R as well. Instead, we add those
packages to the R environment through the r-wrapper. This means that
recommended packages can be updated in cran-packgaes.nix, and those updates
have an effect on the installation without re-building R itself.
'qgis', one of the few 'qwt' dependees in nixpkgs, fails to build with
qwt 6. So I'm not moving the default version away from 5.x. Also, not
changing the default allows easy/safe cherry-picking to the stable
branch.
compiler/simplCore/CoreMonad.lhs:835:10:
Non type-variable argument in the constraint: MonadPlus IO
(Use -XFlexibleContexts to permit this)
In the context: (MonadPlus IO)
While checking an instance declaration
In the instance declaration for `A.Alternative CoreM'
compiler/simplCore/CoreMonad.lhs:841:10:
Non type-variable argument in the constraint: MonadPlus IO
(Use -XFlexibleContexts to permit this)
In the context: (MonadPlus IO)
While checking an instance declaration
In the instance declaration for `MonadPlus CoreM'
