Not sure what is wrong based on the bot message. How can I reproduce/fix it?

I got a trace for the failure:

error: while evaluating anonymous function at /Users/samuel/tmp/ofborg/ofborg/src/outpaths.nix:44:12, called from undefined position:
while evaluating anonymous function at /Users/samuel/tmp/nixpkgs/nixpkgs-PR59018/pkgs/top-level/release-lib.nix:121:6, called from /Users/samuel/tmp/nixpkgs/nixpkgs-PR59018/lib/attrsets.nix:292:43:
while evaluating 'hydraJob' at /Users/samuel/tmp/nixpkgs/nixpkgs-PR59018/lib/customisation.nix:157:14, called from /Users/samuel/tmp/nixpkgs/nixpkgs-PR59018/pkgs/top-level/release-lib.nix:121:14:
while evaluating the attribute 'drvPath' at /Users/samuel/tmp/nixpkgs/nixpkgs-PR59018/lib/customisation.nix:174:13:
while evaluating the attribute 'drvPath' at /Users/samuel/tmp/nixpkgs/nixpkgs-PR59018/lib/customisation.nix:141:13:
while evaluating the attribute 'buildInputs' of the derivation 'gomobile-20190319-167ebed' at /Users/samuel/tmp/nixpkgs/nixpkgs-PR59018/lib/attrsets.nix:194:41:
cannot coerce a function to a string, at /Users/samuel/tmp/nixpkgs/nixpkgs-PR59018/lib/attrsets.nix:194:41

It's related to the meta.platform attribute.

Of note, it shouldn't really be unix unless it is known to build and work on all unices. If you meant "works on Linux and macOS" it would be more prudent to concat linux and darwin's platforms. e.g. platforms = platforms.linux ++ platforms.darwin;.

I'm not sure why the unix platform fails like that, but using linux instead does eval.

Thanks for the insight @samueldr! will try that

Hmm, there's still an issue there.

Here are the instructions to run the meta checks locally:

• https://github.com/NixOS/ofborg/#running-meta-checks-locally

With preliminary testing it looks like it doesn't eval for darwin; it will eval with only linux as a platform, and will not eval with only darwin as a platform. This points towards it not evaluating on darwin.

Preliminary look, cannot coerce a function to a string is the kind of error you'll see when trying to use something that's not derivation like a derivation would be used. I'm thinking that xcodeenv.composeXcodeWrapper is being misused as xcodeWrapper; but I do not know how as I know next to nothing to how Nixpkgs works on Darwin.

Thanks, you were right, I was using composeXcodeWrapper as a function because I wasn't passing the arguments. Fixed.

@GrahamcOfBorg build gomobile

Thanks for the heads up. It's weird that the patch fails to apply, as I'm checking out a precise revision of the source, and this same gomobile/default.nix is working on a project I'm working on.

@GrahamcOfBorg build gomobile