Mindustry: Fails to build on NixOS 21.05

[Kreyren]

[kreyren@leonid:~]$ NIXPKGS_ALLOW_BROKEN=1 nix-env -iA nixos.mindustry
...
configuring
no configure script, doing nothing
building
/build/Mindustry /build

Welcome to Gradle 6.8.3!

...

To honour the JVM settings for this build a single-use Daemon process will be forked. See https://docs.gradle.org/6.8.3/userguide/gradle_daemon.html#sec:disabling_the_daemon.
Daemon will be stopped at the end of the build

FAILURE: Build failed with an exception.

* What went wrong:
Could not open settings generic class cache for settings file '/build/Mindustry/settings.gradle' (/build/tmp.wfALjkNars/caches/6.8.3/scripts/cjjnld3d55pgftpmv7wz6xg61).
> BUG! exception in phase 'semantic analysis' in source unit '_BuildScript_' Unsupported class file major version 60

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

...

BUILD FAILED in 4s
builder for '/nix/store/yi4bxzs4126kx93x8ylp33niln7mfzjz-mindustry-126.1.drv' failed with exit code 1
error: build of '/nix/store/yi4bxzs4126kx93x8ylp33niln7mfzjz-mindustry-126.1.drv' failed

Full log: https://gist.github.com/Kreyren/7e5a80fd56ce1de7949f47c59f090ecd

Steps to reproduce

0. Get updated nixOS 21.05
1. As non-root user invoke NIXPKGS_ALLOW_BROKEN=1 nix-env -iA nixos.mindustry and expect build failure

Technical details

Please run nix-shell -p nix-info --run "nix-info -m" and paste the result.

[kreyren@leonid:~]$ nix-shell -p nix-info --run "nix-info -m"
 - system: `"x86_64-linux"`
 - host os: `Linux 5.10.43, NixOS, 21.05.961.1f91fd10406 (Okapi)`
 - multi-user?: `yes`
 - sandbox: `yes`
 - version: `nix-env (Nix) 2.3.12`
 - channels(root): `"nixos-21.05.961.1f91fd10406"`
 - channels(kreyren): `"home-manager-21.05, master, nixos-21.05.1226.f77036342e2"`
 - nixpkgs: `/nix/var/nix/profiles/per-user/root/channels/nixos`

[Kreyren]

CC @fgaz @petabyteboy

[fgaz]

Well... that's why it's marked as broken ;-)

nixpkgs/pkgs/games/mindustry/default.nix

Lines 195 to 196 in 43b2573

	# does not work with any maintained java version (https://github.com/Anuken/Mindustry/issues/5114)
	|| true;

It looks like this was fixed in build 127, but that's a pre-alpha, so I think we should wait for an actual release

[fgaz]

Hmm... I just tried updating the package to the pre-alpha, kotlin makes it even more complex than it is now

[iam-cult]

This issue is additionally present on NixOS 21.11 unstable, still fails to build with Could not open settings generic class cache for settings file '/build/Mindustry/settings.gradle'

[tutacat]

Well... that's why it's marked as broken ;-)

nixpkgs/pkgs/games/mindustry/default.nix

Lines 195 to 196 in 43b2573

	# does not work with any maintained java version (https://github.com/Anuken/Mindustry/issues/5114)
	|| true;

It looks like this was fixed in build 127, but that's a pre-alpha, so I think we should wait for an actual release

As version after 126 is marked alpha, it makes sense to just use alphas

[fgaz]

As version after 126 is marked alpha, it makes sense to just use alphas

it isn't. edit: I misread, but it won't be like that forever

If someone wants to put in the work, I'd approve a pr that updates to pre-alpha, but I won't put in the work myself until there's a stable release, since it's pretty difficult to package it.

[Mindavi]

We can consider pointing to jdk15 (if still available) to unbreak it for now. I'll look into it (hopefully I find some time today).

Edit: it seems like jdk15 is not exposed, unless adoptopenjdk-hotspot-bin-15 is an option. I'm trying to build with that now.