Hydra vs NeXium

Hydra is a continuous integration service for projects based on Nix. It checks out project source periodically or continuously, builds it, runs tests, and produces reports. Work is organized into jobsets whose inputs can trigger builds when they change; jobsets can also depend on one another. Flake jobsets are supported when their outputs expose a hydraJobs attribute set. Jobs can produce packages, ISO images, or tarballs, and jobset inputs can use Git checkout sources. Hydra also provides a JSON API. It is aimed at Nix and NixOS package developers, not people who only need to use NixOS. Hydra is open source under GPL-3.0 and listed at free. It is self-hosted, with no hosted option listed, and running it is currently supported only on NixOS; the repository recommends the NixOS module for production. Flake evaluation is restricted from accessing files outside the Nix store. Some state is stored in the database, so backups are needed, and the wiki reports that hydra-queue-runner can sometimes leave queued builds unscheduled.

NeXium is an in-development Nintendo Switch emulator for Windows, Linux, and Android. Written in Rust, it uses Vulkan graphics and lets users choose between Dynarmic and Rustarmic AArch64 JIT backends at runtime. It loads .nro homebrew with controller input, and can open decrypted .dxci and .dnsp containers; commercial-game play, saves, and service coverage vary by title. Its library scans NRO, DXCI, and DNSP entries and includes metadata, artwork, profiles, favorites, Quick Launch, and controller navigation. The renderer supports depth, blending, culling, block-linear textures, BC/ASTC formats, and sRGB decoding. NeXium translates guest shaders to SPIR-V and retains per-title and per-device caches, with asynchronous workers for prebuilding. The Android port boots, renders, and plays audio on a real device, with settings, ROM import, and a performance HUD. NeXium is free, open source, and MIT-licensed; builds and features are not paywalled. The project says it needs no proprietary Nintendo firmware, keys, or system files, and advises using only legally owned software.