NixOS Milk-V Duo 256M Test Report

Test Environment

Operating System Information

• System version: 25.05.20250119
• Source code link: https://github.com/NickCao/nixos-riscv
• Reference Installation Document: https://github.com/NickCao/nixos-riscv/README.md

Hardware Information

• Milk-V Duo 256M
• A USB-A Power Adapter
• A USB-A to C Cable
• A microSD Card
• A microSD Card Reader
• A USB to UART Debugger (e.g., CH340, CH341, FT2232, etc.)
• Three DuPont Wires

Installation Steps

Compiling Image

Run nix build ".#hydraJobs.duo-256" if you happen to be using NixOS on your host.

It is not recommended to install and use the nix package manager on other distributions. Try using e.g. the official Docker image instead:

docker run -ti -v $(pwd):/work ghcr.io/nixos/nix

Inside the Docker container:

echo "max-jobs = auto" >> /etc/nix/nix.conf # Enable multi-threaded compilation
echo "substituters = https://mirrors.tuna.tsinghua.edu.cn/nix-channels/store https://cache.nixos.org/" >> /etc/nix/nix.conf # Switch to another mirror
cd /work
nix build ".#hydraJobs.duo-256" --extra-experimental-features nix-command --extra-experimental-features flakes

The resulting image will reside at ./result/sd-image/, with a filename similar to nixos-image-sd-card-25.05.20250119.00e0195-riscv64-linux.img.zst。

Flashing Image to microSD Card

Use dd to flash the image to the microSD card.

Logging into the System

Logging into the system via the serial port.

No password are set and will automatically login by default.

Expected Results

The system should boot normally and allow login via the onboard serial port.

Actual Results

The system booted successfully and login via the onboard serial port was also successful.

Boot Log

<<< Welcome to NixOS sd-card-25.05.20250119.00e0195 (riscv64) - ttyS0 >>>

Run 'nixos-help' for the NixOS manual.

nixos-duo login: root (automatic login)

[root@nixos-duo:~]# uname -a
Linux nixos-duo 5.10.4 #1-NixOS PREEMPT Tue Jan 1 00:00:00 UTC 1980 riscv64 GNU/Linux

[root@nixos-duo:~]# cat /etc/os-release 
ANSI_COLOR="0;38;2;126;186;228"
BUG_REPORT_URL="https://github.com/NixOS/nixpkgs/issues"
BUILD_ID="25.05.20250119.00e0195"
CPE_NAME="cpe:/o:nixos:nixos:25.05"
DEFAULT_HOSTNAME=nixos
DOCUMENTATION_URL="https://nixos.org/learn.html"
HOME_URL="https://nixos.org/"
ID=nixos
ID_LIKE=""
IMAGE_ID=""
IMAGE_VERSION=""
LOGO="nix-snowflake"
NAME=NixOS
PRETTY_NAME="NixOS 25.05 (Warbler)"
SUPPORT_URL="https://nixos.org/community.html"
VARIANT=""
VARIANT_ID=""
VENDOR_NAME=NixOS
VENDOR_URL="https://nixos.org/"
VERSION="25.05 (Warbler)"
VERSION_CODENAME=warbler
VERSION_ID="25.05"

[root@nixos-duo:~]# lscpu
Architecture:          riscv64
  Byte Order:          Little Endian
CPU(s):                1
  On-line CPU(s) list: 0

[root@nixos-duo:~]# 

Test Criteria

Successful: The actual result matches the expected result.

Failed: The actual result does not match the expected result.

Test Conclusion

Test successful.