An Example would be helpful

[archaeron]

Thank you for this package.
I'm trying to use this to get into a development environment with the needed packages as specified by the stack.yaml but I can't make it work.
A small example of how this should work would be super helpful if possible :)

[domenkozar]

@archaeron there are two examples in https://github.com/input-output-hk/stack2nix#usage and stack2nix itself uses stack2nix. What part do you think is missing from those examples?

[archaeron]

here is where I was stuck: https://gist.github.com/archaeron/d5238eb1fe5285a0df6328738b5571fe

I later found out that the problem was the old (newest current) version of stack2nix on hackage. After building through nix failed and building through vagrant failed, I managed to build it through stack and it is working now.

[domenkozar]

Can you paste Nix error?

[archaeron]

Do you mean the nix error while building this?

This is the error I had: #112
https://gist.github.com/archaeron/02ca304fe72ac1eebf1285152b22bd15

The error the old version had was something with "package 'primitive' missing". but I've seen you just published a new version, so that should be fixed, thanks! :)

How do I get into a development environment for my package?
I tried nix-shell -A my-package.env but I can't find cabal in the path then.

[domenkozar]

lets merge into #112 112

[archaeron]

For anyone coming here, hoping for an example, this is how I got it to work (not sure if this is the best way):

cabal2nix . > stack.nix

default.nix:

let
    stackPackages = import ./nix/stack.nix { };
in
    {
        my-package = stackPackages.my-package;
        my-package-shell = stackPackages.shellFor {
            withHoogle = true;
            packages = p: [p.my-package];
        };
        haskellPackages = stackPackages;
    }

stack.nix:

{ pkgs ? import <nixpkgs> {} }:
let
    packages = import ./default.nix;
in
    if pkgs.lib.inNixShell
    then packages.my-package-shell.overrideAttrs (oldAttrs: rec {
        buildInputs =
            [
                packages.haskellPackages.cabal-install
                packages.haskellPackages.ghcid
            ];
    })
    else packages

this allowed me to use nix-shell in that folder
and to use the cabal new-... commands with all necessary libraries installed