Arseniy,
https://github.com/mdorman/nixpkgs/commit/5c08a5bf363344c953998523c986bf7726618e19
contains a change that fixed the problem for me. Please know that
although it seems correct to me---and it does resolve the issue for
me---I might well be mistaken.
Mike.
Arseniy Seroka writes:
> Hello!
Hello! I'm trying to update my haskell set of pkgs to commit
2862d272a606c6188c4c33dab60de4e0066ee194.
I'm just doing `nix-env -i haskell-env -f $NIXPKGS_MASTER` as I was doing for
more than a year.
But I'm getting error `collision between
`/nix/store/k18i1nm5hgnb82y9w2g9hmlwhk3szjld-ghc-8.0.1/li
