[Nix-dev] [Hackage] How to install Hackage package, not presented in nixpkgs, locally?

[Daniel Hlynskyi]

Steps:
1. ~$ git clone https://github.com/NixOS/nixpkgs.git
2. ~$ cd nixpkgs/pkgs/development/libraries/haskell/; mkdir categories;
mkdir pipes-core; cd ../../../../
3. nixpkgs$ cabal2nix cabal://categories-1.0.3 >
pkgs/development/libraries/haskell/categories/default.nix
    nixpkgs$ cabal2nix cabal://pipes-core-0.1.0 >
pkgs/development/libraries/haskell/pipes-core/default.nix
4. edit pkgs/top-level/haskell-packages.nix
5. edit pkgs/top-level/haskell-default.nix to add FORCE_REBUILD = 1; (but
maybe this is redundant, because hash-warnings were not solved)
6. nixpkgs$ nix-env -f . -iA haskellPackages.pipesCore
7. nixpkgs$ ghc-pkg check

2012/8/15 Andres Loeh <ksnix at andres-loeh.de>

> > After rechecking found, that installing `pipes-core` package didn't
> install
> > `categories` package, .nix file for which I added also. When I installed
> > `categories`, it worked. Is it a bug? `Categories` package is mentioned
> in
> > dependencies in pipes-core/default.nix
>
> From your description, I don't fully understand what went wrong, but
> it sounds like something that shouldn't happen. Usually, if you
> install a Haskell package via nix-env, all its Haskell dependencies
> end up in the user environment, too. Do you have a sequence of
> commands that demonstrates the problem, so that I can try to reproduce
> it?
>
> Cheers,
>   Andres
>
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