Problem: Hydra and Travis are not building the same derivations for darwin

[clacke]

Example: Hydra builds /nix/store/zblnmsg3riv6hqj1vsa31av4qabws75b-racket-minimal-6.12, but Travis builds /nix/store/g89lhyjc4qg048chdl5i98sl3a5zyv7z-racket-minimal-6.12, as seen in #146 .

[clacke]

Hydra linux:

$ nix-instantiate https://github.com/fractalide/racket2nix/archive/master.tar.gz --arg pkgs 'import (builtins.fetchurl { url = https://github.com/fractalide/racket2nix/raw/master/nixpkgs.nix; }) { system = "x86_64-darwin"; }'
warning: you did not specify '--add-root'; the result might be removed by the garbage collector
/nix/store/qcq6abs73xzgqgic869q5ph6mlm308jk-nix.drv

Hydra darwin: same

So apparently just setting system should be good enough.

But Travis wants to build /nix/store/800z3kj6nwq8ana2v3v7q6r12y5j98m1-racket-minimal-6.12.drv. We need to find out what's different about that one.

[clacke]

I had a sudden realization that this is probably going to involve us having to deal with properly categorizing buildInputs and nativeBuildInputs, or at least build system vs target system.

[clacke]

But now I get 800z3kj6nwq8ana2v3v7q6r12y5j98m1-racket-minimal-6.12.drv and g89lhyjc4qg048chdl5i98sl3a5zyv7z-racket-minimal-6.12 on both darwin and linux, so I guess it might actually be as simple as a case of support/utils/setup-hydra.fractalide.com.sh not working on darwin. We probably need to kick nix-daemon to re-read the nix.conf.

[clacke]

Yes, that was it. Closed by #148 .

[clacke]

I had a sudden realization that this is probably going to involve us having to deal with properly categorizing buildInputs and nativeBuildInputs, or at least build system vs target system.

It didn't. But just want to say that this was already brought up in #138 .