Workaround: Getting a derviation that can execute Pollen

[MazeChaZer]

Now that the Pollen package builds again there was one last step for me to be able to actually use it with Nix: Getting a derivation where I can execute raco pollen start. Selecting just the pollen package gives me no binaries at all, and unlike with Scribble, there is no pollen-lib package. I poked around a little and found this workaround working for me:

{ pkgs ? import <nixpkgs> {}
, racket2nix ? pkgs.fetchFromGitHub {
      owner = "fractalide"; repo = "racket2nix";
      rev = "073a25e536ed9cc8d7267fc78019992bd171d4cf";
      sha256 = "0s7xp0j2vnwsqc0isbpw8pibdagwh0cai15w5z753wqllliz8qa9";
  }
}:
let pollenPackage = import racket2nix { package = "pollen"; };
    pollen = pkgs.runCommand "pollen" {} ''
        ln -s \
            $(cat ${pollenPackage}/nix-support/propagated-build-inputs) \
            $out
    '';
in pollen

It's not very pretty, but it seems to work and if I don't have any further problems this is fine for now. I read in other issues that perhaps someday there could be a racket.withPackages, at least then this workaround will no longer be necessary. I just wanted to post this here in case someone else wants to use Pollen with racket2nix right now.

[clacke]

I'm surprised that the above works, I'll have to figure out why some day. :-)

Less surprising (but no more documented :-) ) would be to access the lib output of the pollen package. That's where a raco lives that knows about pollen:

{ pkgs ? import <nixpkgs> {}
, racket2nix ? pkgs.fetchFromGitHub {
      owner = "fractalide"; repo = "racket2nix";
      rev = "073a25e536ed9cc8d7267fc78019992bd171d4cf";
      sha256 = "0s7xp0j2vnwsqc0isbpw8pibdagwh0cai15w5z753wqllliz8qa9";
  }
}:
(import racket2nix { package = "pollen"; }).lib

That's what I was talking about in the other issue, but not in as clear and concrete terms.

[MazeChaZer]

That is simpler and for me works just as well, thanks :)