Unbreak tensorflow haskell 1

[mikesperber]

Motivation for this change

haskellPackages.tensorflow is currently badly broken. I have things working, and will submit the associated pull requests successively. First, I need updates to the various dependencies - this is this pull request.

Things done

• Tested using sandboxing (nix.useSandbox on NixOS, or option sandbox in nix.conf on non-NixOS linux)
• Built on platform(s)
  • NixOS
  • macOS
  • other Linux distributions
• Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
• Tested compilation of all pkgs that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review wip"
• Tested execution of all binary files (usually in ./result/bin/)
• Determined the impact on package closure size (by running nix path-info -S before and after)
• Ensured that relevant documentation is up to date
• Fits CONTRIBUTING.md.

[cdepillabout]

LGTM.

I'll continue to merge these PRs for you, but I'm worried about two things:

1. The upstream tensorflow-haskell repo looks somewhat dead. There seem to be a bunch of useful PRs sitting around that no one is merging. There doesn't appear to be anyone working on updating tensorflow-haskell for tensorflow-1.15.
2. I guess eventually nixpkgs will drop support for tensorflow-1? And at that point, tensorflow-haskell just won't be able to be compiled, unless it gets support for tensorflow-2?

If upstream doesn't merge your PRs in a timely manner, maybe you should just fork tensorflow-haskell? Maybe you'd be able to find a community of people willing to work on it?

Alternatively, I think there is already a good community around hasktorch, if you'd be interested in using that instead.

[mikesperber]

Good points all. At the moment though, we're actively using it and I can take over maintenance for the next couple of months. (And I'm working on getting it going with Tensorflow 1.15.) If and when it dies, that'll be fine. But that's not yet.

[mikesperber]

BTW, thanks for merging!