error: attribute 'sources' missing -- M1 Mac

[xave]

Issue: Following the instructions on the IOHK site fails to build on M1 Mac.

Error Message:

error: attribute 'sources' missing

       at /Users/xavier/Documents/projects/webdev/scotty-site/default.nix:24:5:

           23|     # But you can also just use your own, e.g. '<nixpkgs>'.
           24|     haskellNix.sources.nixpkgs-unstable
             |     ^
           25|     # These arguments passed to nixpkgs, include some patches and also

Steps:

1. stack new projectname
2. Set up binary cache in /etc/nix/nix.conf by adding the two lines listed in the instructions.
3. Didn't install Niv because it won't complete an install.
4. Used the no-Niv workaround to produce this default.nix with deviations as laid out in the instructions.

let
  ## Read in the Niv sources
  #sources = import ./nix/sources.nix {};
  ## If ./nix/sources.nix file is not found run:
  ##   niv init
  ##   niv add input-output-hk/haskell.nix -n haskellNix

  # Read sources without Niv using pinned ghc
  sources = { 
    haskellNix = builtins.fetchTarball "https://github.com/input-output-hk/haskell.nix/archive/f1a94a4c82a2ab999a67c3b84269da78d89f0075.tar.gz";
      };


  # Fetch the haskell.nix commit we have pinned with Niv
  haskellNix = import sources.haskellNix {};
  # If haskellNix is not found run:
  #   niv add input-output-hk/haskell.nix -n haskellNix

  # Import nixpkgs and pass the haskell.nix provided nixpkgsArgs
  pkgs = import
    # haskell.nix provides access to the nixpkgs pins which are used by our CI,
    # hence you will be more likely to get cache hits when using these.
    # But you can also just use your own, e.g. '<nixpkgs>'.
    haskellNix.sources.nixpkgs-unstable
    # These arguments passed to nixpkgs, include some patches and also
    # the haskell.nix functionality itself as an overlay.
    haskellNix.nixpkgsArgs;
in pkgs.haskell-nix.project {
  # 'cleanGit' cleans a source directory based on the files known by git
  src = pkgs.haskell-nix.haskellLib.cleanGit {
    name = "haskell-nix-project";
    src = ./.;
  };
  # Specify the GHC version to use.
  compiler-nix-name = "ghc8102"; # Not required for `stack.yaml` based projects.
}

5. Ran nix-build -A projectname.components.library on what is at this point a stock Haskell project.
6. Received the Error Message as listed above.

[hamishmack]

    haskellNix = builtins.fetchTarball "https://github.com/input-output-hk/haskell.nix/archive/f1a94a4c82a2ab999a67c3b84269da78d89f0075.tar.gz";

f1a94a4c82a2ab999a67c3b84269da78d89f0075 is a very old version of haskell.nix. I suspect we might not have updated the commit hash in the docs when the instructions were changed.

Try updating to a more recent haskell.nix commit hash. For instance c810f3af58d6e93d1459315ae26b8d8e4b5c1f3d:

    haskellNix = builtins.fetchTarball "https://github.com/input-output-hk/haskell.nix/archive/c810f3af58d6e93d1459315ae26b8d8e4b5c1f3d.tar.gz";

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[hamishmack]

Did using a more recent haskell.nix help?

[xave]

I stopped using Haskell nix, so I would say not. I am pretty good about trying solutions that people present to me. Perhaps this weekend I can play around with it again.

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.