What could be the reason for missing module?
$ nix-shell -p haskellPackages.ghc -p haskellPackages.random
give following shell
[nix-shell:~]$ ghci
GHCi, version 8.0.2: http://www.haskell.org/ghc/ :? for help
Loaded GHCi configuration from /data/works/dotfiles/ghci
Prelude> import System.Random
<no location info>: error:
Could not find module ‘System.Random’
It is not a module in the current program, or in any known package.
And what is the nix way to install and use Haskell packages?
I thought nixos.haskellPackages.<package> will automatically registered for ghc but it seem like it is not the case.
Reinstall the random inside the shell don't fix it.
[nix-shell:~]$ nix-env -iA nixos.haskellPackages.random
installing ‘random-1.1’
[nix-shell:~]$ ghc-pkg list | grep -i random