Utahraptor

Verified end to end on 2026-09-06T18:12:30Z: installed to a LUKS2-encrypted disk, unlocked at the Plymouth prompt, and logged in to a GNOME session — the shot above is fastfetch inside that booted install. Full record and more screenshots in docs/verification, refreshed by just luks-test.

†Utahraptor ostrommaysi

Bluefin built on Fedora Hummingbird. The more ... civilized murder machine.

Your day keeps getting worse. Why are there more.

Experimental pre-alpha — the image builds, boots, and reaches GDM in local QEMU validation. No image has been published to a registry, there is no installer payload, and no ISO has been released. Nothing here is ready to run on a machine you care about. Filing issues is the whole point.

What it is

Bluefin built on Fedora Hummingbird, which supplies a hardened, fast-moving bootable base and no desktop at all. Utah adds the desktop: Bluefin's package contract on top, and the GNOME 51 stack built from source because neither Hummingbird nor a Fedora release ships it.

Two repositories, the way common and brew already work:

Repository	What it does
projectbluefin/utah	This one. Composes the image.
projectbluefin/utah-packages	Builds GNOME 51 and the rest of the desktop stack from verified upstream sources, and publishes them as an OCI image.

Image streams

Tag	Stream	What it is
:testing	Dev	Built from testing, advanced only after end-to-end validation.
:stable	Stable	Promoted from :testing.

Four flavors per stream — utah, utah-nvidia, utah-gaming, utah-nvidia-gaming — matching Bluefin's. config/flavors.json is the single source for that set, for the promote and release matrices, and for whether the kernel cache image gets built at all.

None of these are published yet. The tags above describe what the pipeline is built to produce, not something you can pull today.

Package parity with Bluefin

packages/bluefin.toml is a byte-for-byte copy of Bluefin's base.toml, and CI diffs it against upstream on every run, so drift fails the build rather than being noticed later.

	count
Bluefin contract installed	61
Utah additions (GNOME 51, desktop services)	12
Genuinely unavailable	4

The install writes its resolved list to /usr/share/utah/contract.txt and the verify step asserts that file, so the two cannot disagree.

Known gaps

This is the honest list, and it is why the label above says pre-alpha.

• Nothing is published. No image, no ISO artifact, no installer. A live ISO builds locally (just iso); installer payload integration is the next ISO milestone.
• The NVIDIA and gaming flavors are unproven. The OGC kernel compiles with sched_ext and binderfs genuinely enabled, and the NVIDIA open module compiles for the base kernel. The module against the OGC kernel, the driver installer flags, and the flavored builds pulling the kernel cache image have not yet all passed in one run.
• pipewire-libs-extra is missing. It was never a Fedora package; it exists only in negativo17's fedora-multimedia, which Bluefin enables for its whole install.
• Codec support differs. Twelve [multimedia_overrides] names are packages Fedora already ships and Bluefin replaces with negativo17 builds. Utah installs Fedora's. Nothing is absent from the image; hardware-accelerated codecs are what differ. utah-packages already builds several of them, so this closes when Utah consumes that overlay.
• The image is still pre-alpha. The digest-pinned utah-packages OCI repository is consumed and the local QEMU image reaches GDM and GNOME Shell.
• CUDA is deliberately excluded — 7.68 GB installed. Use the NVIDIA container toolkit, which is included, and run CUDA in a container.

See the open issues for where things stand.

Contributing or building from source

See docs/building.md for how to build the image locally, and docs/skills/ for the deep documentation. Agents start at AGENTS.md.