I don't think I really understand tryEval:

$ nix-instantiate --strict --eval --expr 'builtins.tryEval (builtins.elemAt [] 1)'
error:
       … while calling the 'tryEval' builtin
         at «string»:1:1:
            1| builtins.tryEval (builtins.elemAt [] 1)
             | ^

       … while calling the 'elemAt' builtin
         at «string»:1:19:
            1| builtins.tryEval (builtins.elemAt [] 1)
             |                   ^

       error: list index 1 is out of bounds

What makes some error able to be tryEval'd away and what makes it not able to be?

I'd have to refer to documentation to give the exact answer, but it depends on how the error was produced.

For example throw can be "caught" by tryEval, but I believe abort cannot.

I'd expect most errors (e.g. failed assert statements) to be the equivalent of a throw rather than an abort.

I have

lib.attrsets.genAttrs [ "nix-inspect" "nixvim-config" "bundix" "feedback" "talon" "rime" "nix-ld-rs" "devenv" ] (name: "input
s.${name}.packages.x86_64.default")
{
  bundix = "inputs.bundix.packages.x86_64.default";
  devenv = "inputs.devenv.packages.x86_64.default";
  feedback = "inputs.feedback.packages.x86_64.default";
  nix-inspect = "inputs.nix-inspect.packages.x86_64.default";
  nix-ld-rs = "inputs.nix-ld-rs.packages.x86_64.default";
  nixvim-config = "inputs.nixvim-config.packages.x86_64.default";
  rime = "inputs.rime.packages.x86_64.default";
  talon = "inputs.talon.packages.x86_64.default";
}

but I want the attrs on the rhs to be attributes not just strings.

How would I achieve that ?

In reply to @emilazy:matrix.org
just drop the quotes

In reply to @tsn9cp:matrix.org
Hi. I'm learning to make derivations and I have an issue where the haxe package manager requires a ~/.haxelib folder for configuration. In my buildPhase I have this: mkdir -p ./lib && haxelib setup ./lib, which then yields this error from haxelib in the output > Error: [file_open,/homeless-shelter/.haxelib]. How would I resolve this?

In reply to @tsn9cp:matrix.org
Hi. I'm learning to make derivations and I have an issue where the haxe package manager requires a ~/.haxelib folder for configuration. In my buildPhase I have this: mkdir -p ./lib && haxelib setup ./lib, which then yields this error from haxelib in the output > Error: [file_open,/homeless-shelter/.haxelib]. How would I resolve this?

In reply to@ity:itycodes.org
Since that does not seem to be a question about the Nix Language but rather about nixpkgs (as you are talking about buildPhase which is a part of some nixpkgs builders) I feel that you might get better answers in #users:nixos.org

In reply to @raphi:tapesoftware.net
builtins.storeDir?