On 12/06/2014 05:29 PM, Carlo Nucera wrote:
> Hi Peter
>
> I added this snippet to my ~/.nix-packages/config.nix
>
> ghcTestEnv = self.haskellPackages_ghc783.ghcWithPackages (p: with p; [
> mtl
> ]);
>
> and ran:
>
> $ nix-env -p /tmp/haskell -iA ghcTestEnv
> $ /tmp/haskell/bin/ghci
Hi Peter,
for completeness, could you post a version in which this approach is
used in conjunction with ghcWithPackages? I mean a working
~/.nixpkgs/config.nix,
so that I can point people to it?
Thanks
Carlo
2014-12-06 23:39 GMT+01:00 Peter Simons :
> Hi Carlo,
>
> > I wrote the nix expression
Yes, thank you, this was exactly what I was in search of!
Now my configuration works :)
Bests
Carlo Nucera
2014-12-06 23:39 GMT+01:00 Peter Simons :
> Hi Carlo,
>
> > I wrote the nix expression for abcnotation, and it's not yet present
> > in the channel. What would be the right way to add an e
Hi Benno,
> I just assumed that since I had two versions of hashable with
> different cabal hashes installed, that one of them was a GHC core
> package.
oh, that doesn't sound good. There should be only one version of
hashable active per compiler version, really.
> 1. Install a package depe
Hi Carlo,
> I wrote the nix expression for abcnotation, and it's not yet present
> in the channel. What would be the right way to add an expression made
> by me in this setup?
run the commands
$ cabal2nix cabal://prettify >~/.nixpkgs/prettify.nix
$ cabal2nix cabal://abcnotation >~/.nixpkg
Or maybe I just have another version of hashable installed system wide via
configuration.nix
Benno Fünfstück schrieb am Sa., 6. Dez. 2014
18:57:
> Hi Peter,
>
> Oh, I just assumed that since I had two versions of hashable with
> different cabal hashes installed, that one of them was a GHC core p
Hi Peter,
Oh, I just assumed that since I had two versions of hashable with different
cabal hashes installed, that one of them was a GHC core package. But now
that I think of it you're probably correct, and this just happened because
I did something similar to the following:
1. Install a package
Hi Peter
I added this snippet to my ~/.nix-packages/config.nix
ghcTestEnv = self.haskellPackages_ghc783.ghcWithPackages (p: with p; [
mtl
]);
and ran:
$ nix-env -p /tmp/haskell -iA ghcTestEnv
$ /tmp/haskell/bin/ghci
Prelude> import Control.Monad.State.Lazy
These commands worked w
Hi Benno,
> I think the problem occurs because in recent nixpkgs hashable was
> upgraded, but hashable is a GHC core package and thus cannot be
> replaced.
hashable is a core library? In which versions of GHC is that so?
Best regards,
Peter
___
nix
Hi Carlo,
> ghc-pkg check is full of errors
I don't think that "ghc-pkg check" ever succeeded in any ghc-wrapper
based installation.
> packages I installed no longer load in ghci
There is no obvious explanation for the errors you've described. As
random suggestion how you might obtain some ad
Ok, I saw pkgs/top-level/haskell-packages.nix and I understand now
what you're talking about.
Is there a simple way to patch that value throug my
~/.nix-packages/config.nix file?
Carlo Nucera
2014-12-06 17:36 GMT+01:00 Benno Fünfstück :
> Hello,
>
> I think the problem occurs because in recent ni
Hello,
I think the problem occurs because in recent nixpkgs hashable was upgraded,
but hashable is a GHC core package and thus cannot be replaced. I guess
that previously the version provided by GHC was newer than the nixpkgs one,
so it shadowed the nixpkgs version. Now, with the upgraded version,
Hi all. I managed to create a nice setup for haskell
development. However, I did:
$ sudo nix-channel --update
$ sudo nixos-channel rebuild
After updating, my haskell installation is broken, ghc-pkg check is
full of errors, and the packages I installed no longer load in ghci.
I could rollback but
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