@cyanescens One more thing. Some Java packages in the AUR for old java version are incorrectly packaged with "provides=('java-runtime')". They should specify the version ("provides=('java-runtime=11')). If you have one of those installed, then I suggest you switch to one of the official provided JRE or JDK (jre-openjdk/jdk-openjdk).

@cyanescens You must be using Java 14 or older, as the ZGC has been in production since version 15. I have updated the dependencies to requrie 'java-runtime>=25', which is needed for this and also the compact object headers, which improve memory usage a ton.

I get this error at launch, reinstalling does not help:

Error: VM option 'UseZGC' is experimental and must be enabled via -XX:+UnlockExperimentalVMOptions.
Error: The unlock option must precede 'UseZGC'.
Error: Could not create the Java Virtual Machine.
Error: A fatal exception has occurred. Program will exit.

@Deuchnord indeed, the server is down ATM. The sysadmin was already notified and is working on getting it up again, but I don't know how long it will take.

@Mr.Smith1974 I updated the dependency. Will add the new gaiasky-git package to the list of packages in the Gaia Sky website. Thanks!

Please change dependencies from jre-openjdk to java-runtime

@Mr.Smith1974 it indeed uses a pre-compiled package, but this is a Java application, so it is not really binary but intermediate java bytecode. If someone creates a build-from-source package for gaiasky, then I am ok with just dropping this verrsion in favour of the new one.