This seems to break a handful of .Net packages.

@vbgl, I am trying to find my way around in this - this is my first attempt to contribute, so there will be some bumps. Currently I am trying to find a way to extend dotnetPackages collection to include new package/versions that new F# depends on (number of dependencies increased quite a bit).

Is there any way to flag this PR as incomplete? Or should I just close it and re-open whenever I feel it is more ready (though I kind of like the feedback I get from Travis CI)?

I can mark it as wip

Thanks!

@kuznero just ping me when you want WIP removed

@ndowens I think I have completed the task... in terms of building and installing F# 4.1.7. Though I cannot understand why it fails. It seems the build script is trying to build some dotNet packages with using this F# and it fails (but I noticed that it is using old version of mono - 4.0.x).

Please advice how should I proceed from now.

@copumpkin, @edef1c, please review this PR. I am pretty new to Nix(OS) community but work with dotNet ecosystem on a daily basis and would really like to get new F# compiler in.

It feels that there is something irrelevant that fails in that build now

This breaks F*, at least on darwin; the logs ends with:

cp: cannot stat '/nix/store/nijphlmsphkcacam191wpp2r1gczsqvy-fsharp-4.1.7/lib/mono/4.5/FSharp.Core.dll': No such file or directory
builder for ‘/nix/store/ba2rg0i86m3d56aihqd5z1qkb6xz7fzh-fstar-0.9.2.0.drv’ failed with exit code 1

I ended up introducing new package fsharp41 based on mono46.

@ndowens I think it is ok to remove WIP tag now.

It all should be done now.

@kuznero I don't know much about .NET or F#, but just for your future reference,

cd nixpkgs
export NIXPKGS=$(pwd)
nix-build -A fsharp41 $NIXPKGS

you don't need the $NIXPKGS variable. nix-build defaults to pointing at the current directory if not passed any arguments, so nix-build -A fsharp41 should do the exact same thing for you.

@copumpkin thanks for the tip, I am happy to learn more about nix.