submodules support in project'

[domenkozar]

Currently:

final.haskell-nix.project' {
  src = ./.;
  compiler-nix-name = "ghc964";
};

Chokes with:

> stack-to-nix: /build/tmp.0LXUnio927/mysubproject: getDirectoryContents:openDirStream: does not exist (No such file or directory)

Where mysubproject is a git submodule listed in stack.yaml as a local package.

[domenkozar]

Solved with nix build '.?submodules=1#myattr' due to NixOS/nix#6633

[hamishmack]

For some reason on MacOS I've not been able to get . on its own to work. Instead I have to put the full URL in:

nix develop 'git+file:///Users/hamish/ghcjs-project?submodules=1#'