Can't build the image with dockerTools.pullImage

[PierreR]

Given these two calls to pullImage the nixos/nix one will work without problem while the uncommented fromImage nixorg/nix will fail.

  docker = dockerTools.buildImage {
    name = "pi3r/shell";
    fromImage = dockerTools.pullImage {
      imageName = "nixorg/nix";
      imageDigest = "sha256:9cb8235b8537c4ccfad77ed29e181106ff03a7ac9db97417ead3628d52fe6a0c";
      sha256 = "045swkdqjh24pgb8kb798ya34my5ryvbikzavxi3ns8y7l0prxff";
      finalImageTag = "1";
    };
    # fromImage = dockerTools.pullImage {
    #   imageName = "nixos/nix";
    #   imageDigest = "sha256:d414c533649e405f2a5966b5019f042c84e511cf468965c9ef03719ae2b0c124";
    #   sha256 = "045swkdqjh24pgb8kb798ya34my5ryvbikzavxi3ns8y7l0prxff";
    #   finalImageTag = "2.0";
    # }
    config.Entrypoint = [ "${pkgs.bash}/bin/bash"];
    config.Env = [
      "PATH=/nix/var/nix/profiles/default/bin:/nix/var/nix/profiles/default/sbin:/bin:/sbin:/usr/bin:/usr/sbin:${project}/bin:${pkgs.jq}/bin:${pkgs.pepper}/bin:${pkgs.bash}/bin"
      "NIX_PATH=/nix/var/nix/profiles/per-user/root/channels"
    ];
  };

The failure is:

Copying config sha256:65f9a18fa5d22f9bf79125d55102f9da5b5e7b7d2c920c987dbc9bce98e8df5a
 5.50 KB / 5.50 KB  0s
Writing manifest to image destination
Storing signatures
warning: path '/nix/store/z0903xp1wqjvdss8gwvjp6i2via47pnw-docker-image-nixorg-nix-1.tar' claims to be content-addressed but isn't
error: unexpected end-of-file

In both cases I am generating the imageDigest with skopeo.
I quite don't understand what's going on but I have the exact same issue with https://hub.docker.com/r/lnl7/nix so I guess the issue is not really related to nixorg/nix per se.

I am using:

{
  "url": "https://github.com/NixOS/nixpkgs.git",
  "rev": "c4f5d559dad3f86071ddb8de02a9f3ed715d13b8",
  "date": "2018-05-11T18:31:48+02:00",
  "sha256": "1d1i6s9476dkjmb6danvy2ixlv8indc94q6g49yracsz6q1sl46a",
  "fetchSubmodules": true
}

which includes the recent changes to pullImage.

Thanks for your help

[zimbatm]

I am not quite sure how to interpret this error.

https://github.com/NixOS/nix/blob/master/src/libstore/store-api.cc#L743-L768

I don't see where this ca variable comes from, neither the other ones