NixOS MicroVMs
C-Rank Grade: B (Solid) - 59/100
External PR Merge Rate: 67%
Response Time: 15h
First Timer Success: 67%
microvm-nix/microvm.nix has a recorded first-timer success rate of 66.7%. Repositories ranked B typically provide actionable feedback during code reviews and actively nurture new community contributors.
Maintainers in microvm-nix/microvm.nix respond to incoming external pull requests in approximately 14.7 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 58.6 places microvm-nix/microvm.nix in the B tier.
The external contributor pull request merge rate for microvm-nix/microvm.nix is 66.7%, based on public PR activity from non-core contributors.
microvm-nix/microvm.nix currently has 2 active issue(s) tagged with beginner-friendly labels like "good first issue", "beginner", or "up-for-grabs".
Collaborative maintainer environment in microvm-nix/microvm.nix. Reviews community pull requests with focus on project quality.
Discussions in microvm-nix/microvm.nix focus heavily on practical implementation feedback, code formatting standards, and issue reproduction details.
Unlinked PRs without issue context and changes that fail automated test suites face the highest review friction.
Average Response Latency
Tracks hours until a maintainer leaves a review, comment, or PR response.
External Acceptance Rate
Percentage of community pull requests successfully merged into main.
First PR Conversion
Rate at which developers submitting their first repository PR succeed.
Show contributors that your repository actively reviews and merges external pull requests.
[](https://getmerged.abhishekco.de/microvm-nix/microvm.nix?utm_source=github&utm_medium=badge)
External PR acceptance
First PR success rate
50% receive response in
90% receive response in
Maintainer review activity heatmap & prime window prediction
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Maintainers are most responsive around 19:00 UTC (19:00 UTC in your timezone). Recommended submission window is Wednesday - Friday from 17:00 to 21:00 UTC (17:00 - 21:00 UTC local).
Limited recent maintainer review activity recorded for this repository. Prediction based on heuristic baseline.
Maintainer Strategy: Maintainer Sweet Spot: PRs under 150 lines merge in ~10 hours (83% approval). Large PRs (>500 lines) take ~71 hours (30% approval). Keep your diff compact for rapid review.
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Hello, I wanted to set up a vfkit backed microvm with user-mode networking while having the ability to ssh into it and this is generally possible with vsock channel, however as of now this is not implemented microvm.nix/lib/runners/vfkit.nix Lines 117 to 118 in 2f2f62f else if vsock.cid != null then throw "vfkit vsock support not yet implemented in microvm.nix" As mentioned in a PR that introduced darwin integration, vfkit does support virtio-vsock communication, so it's a matter of how it has to be exposed by microvm, not a vfkit limitation. Ideally, I would like to have systemd-vmspawn-like experience with microvm.nix, where this channel setup happens transparently and for that some additional ssh config plumbing is required. Of course, microvm.nix should present this option in the most general way, so I wonder what would be the mi
According to systemd/systemd#24204 https://github.com/systemd/systemd/blob/78208556b281bd6ee8a95d16a517152728010475/docs/CREDENTIALS.md?plain=1#L303 fw_cfg has a 55 bytes name length limit, and many systemd creds names are actually longer than that, e.g. opt/io.systemd.credentials/ssh.ephemeral-authorized_keys-all. SMBIOS is the new recommended way to pass in credentials.
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When evaluating whether to contribute to microvm-nix/microvm.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 microvm-nix/microvm.nix acknowledge new external contributions in approximately 14 hours. Out of all submitted pull requests from non-core authors in the last 180-day window, 66.7% were successfully merged into the primary branch.
microvm-nix/microvm.nix has a recorded first-timer success rate of 66.7%. Repositories ranked Solid typically provide actionable feedback during code reviews and actively nurture new community contributors.
The initial maintainer response time averages ~14 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 58.6 places microvm-nix/microvm.nix in the Solid tier.
The external pull request merge rate is 66.7%. GetMerged isolates non-core community contributions so external developers get an accurate benchmark of PR acceptance probability.
Yes, microvm-nix/microvm.nix currently has 2 active issue(s) tagged with beginner-friendly labels. You can inspect these directly from the repository issues tab.
All metrics displayed for microvm-nix/microvm.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.