A slightly opinionated Nix flake for ComfyUI with curated custom nodes. Supports macOS (Apple Silicon) and Linux with CUDA.
C-Rank Grade: A (Welcoming) - 65/100
External PR Merge Rate: 95%
Response Time: 6h
First Timer Success: 100%
utensils/comfyui-nix has a recorded first-timer success rate of 100.0%. Repositories ranked A typically provide actionable feedback during code reviews and actively nurture new community contributors.
Maintainers in utensils/comfyui-nix respond to incoming external pull requests in approximately 6.4 hours on average. Keeping PRs focused on single tasks and ensuring tests pass helps maintainers review faster.
The C-Rank™ system evaluates GitHub projects on a 0–100 scale using real data: PR merge rates, review turnaround time, active maintainer presence, and first-time contributor success. A score of 65.5 places utensils/comfyui-nix in the A tier.
The external contributor pull request merge rate for utensils/comfyui-nix is 95.2%, based on public PR activity from non-core contributors.
utensils/comfyui-nix currently has 3 active issue(s) tagged with beginner-friendly labels like "good first issue", "beginner", or "up-for-grabs".
Active maintainer team in utensils/comfyui-nix welcoming community pull requests and bug fixes.
Average Response Latency
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External Acceptance Rate
Percentage of community pull requests successfully merged into main.
First PR Conversion
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Show contributors that your repository actively reviews and merges external pull requests.
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Historical health & responsiveness evolution
External PR acceptance
First PR success rate
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90% receive response in
Maintainer review activity heatmap & prime window prediction
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Maintainers are most responsive around 13:00 UTC (13:00 UTC in your timezone). Recommended submission window is Wednesday - Friday from 16:00 to 20:00 UTC (16:00 - 20:00 UTC local).
Maintainer Strategy: Maintainer Sweet Spot: PRs under 150 lines merge in ~4 hours (96% approval). Large PRs (>500 lines) take ~31 hours (43% approval). Keep your diff compact for rapid review.
Bug Description I am not sure it's related, but Pytorch ist outdated. Always when I try to generate an image, it's crashing and the service is restarting: Nix-declaration: Steps to Reproduce Install via Nix Access and download models Try to run sample Expected Behavior Image would be generated Error Logs Platform Linux (x86_64) ComfyUI Version latest (15.06.26) Additional Context No response
Bug Description Two improvements from a downstream Battlemage (Arc Pro B70) deployment I've been running comfyui-nix on an Arc Pro B70 (Xe2 / Battlemage / xe-kmd) host and hit two issues that needed downstream patches. Both have clean fixes that would benefit anyone running on Intel XPU. 1. nix/patches/comfyui-cpu-fallback.patch is CUDA-only — bricks XPU and MPS hosts What the patch currently does + # Fallback to CPU if CUDA is not available and we're not on MPS + # This fixes running on Linux systems without NVIDIA GPUs + if cpu_state == CPUState.GPU: + if not torch.cuda.is_available(): + cpu_state = CPUState.CPU The problem The comment says "we're not on MPS", but the code only checks torch.cuda.is_available(). On any host where Intel XPU (or MPS) is the only GPU, this unconditionally clobbers cpu_state to CPUState.CPU, even though ComfyUI's own is_intel_xpu() would (correctly) return True immediately afterwards. Observed symptom on Arc Pro B70 (gpuSupport = "xpu"): t
Bug Description I'm trying to use the flake on my GMKTec evo-x2. Whenever I try to generate an image with a very basic flow (model to clip to KSampler to VAE Decode to preview) ComfyUI seems to crash and then restart. This always happenes at the model loading stage. Steps to Reproduce Click on run My ComfyUI config: services.comfyui = { enable = true; gpuSupport = "rocm"; enableManager = true; listenAddress = "127.0.0.1"; port = 8188; dataDir = "/home/simon/comfyui"; createUser = false; user = "simon"; group = "users"; }; I also tried setting HSA_OVERRIDE_GFX_VERSION = "11.5.0"; which works with ollama (see https://github.com/Ilosariph/nixos-config/blob/main/no-desktop/machines/evo/ollama.nix) Currently using this flake input because of the frog issue: comfyui-nix = { url = "github:jjthiessen/comfyui-nix/fix-issue-31"; }; Expected Behavior The image generates. Error Logs Here is the `journalctl -u comfyui -f --output cat`: got prompt model weight dtype tor
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When evaluating whether to contribute to utensils/comfyui-nix, response velocity and maintainer engagement are crucial. GetMerged continuously tracks pull request trajectories, first-comment latency, and code review rounds to help developers avoid submitting pull requests to backlogged repositories.
Currently, maintainers of utensils/comfyui-nix acknowledge new external contributions in approximately 6 hours. Out of all submitted pull requests from non-core authors in the last 180-day window, 95.2% were successfully merged into the primary branch.
utensils/comfyui-nix has a recorded first-timer success rate of 100.0%. Repositories ranked Welcoming typically provide actionable feedback during code reviews and actively nurture new community contributors.
The initial maintainer response time averages ~6 hours. Keeping PRs scoped to single concerns and ensuring CI checks succeed will optimize review turnaround.
The C-Rank™ index scores repositories on a 0 to 100 scale using an objective formula: external PR merge rates, initial response speed, active maintainer count, and first-time contributor retention. A score of 65.5 places utensils/comfyui-nix in the Welcoming tier.
The external pull request merge rate is 95.2%. GetMerged isolates non-core community contributions so external developers get an accurate benchmark of PR acceptance probability.
Yes, utensils/comfyui-nix currently has 3 active issue(s) tagged with beginner-friendly labels. You can inspect these directly from the repository issues tab.
All metrics displayed for utensils/comfyui-nix are automatically retrieved via the public GitHub API and recalculated daily. Insider pull requests submitted by repository owners or organization members are excluded from merge rate calculations to preserve objective external contributor statistics.