munix

WIP: A microVM runner for NixOS systems with desktop integration, powered by muvm/libkrun.

Quick Start

1. Build a test VM:

nix build '.#nixosConfigurations.testvm-x86_64.config.system.build.toplevel' -o testvm

2. Run the VM:

nix run '.#munix' -- testvm

This will start an interactive bash session inside the microVM.

Run a specific command:

nix run '.#munix' -- testvm fastfetch

munix Options

• --uid UID, -u UID - Set microVM UID (default: 1337)
• --gid GID, -g GID - Set microVM GID (default: 1337)
• --no-gpu - Disable GPU acceleration
• --no-wayland - Disable Wayland support
• --no-pipewire - Disable PipeWire audio
• --x11 - Enable X11 support
• --bind SRC DST - Bind mount SRC to DST in the VM
• --ro-bind SRC DST - Read-only bind mount
• --expose PATH - Expose PATH in the VM at the same location
• --ro-expose PATH - Expose PATH read-only

Example with options:

nix run '.#munix' -- --no-gpu --ro-expose /home/user/data testvm htop

Development

Working on muvm & munix locally (not built into the nix store):

cd muvm && cargo build --locked --release
PATH=$PWD/muvm/target/release:$PATH ./munix testvm

Requirements

• Linux system with KVM support (/dev/kvm)
• For GPU acceleration: Kernel 6.13+ with compatible drivers (amdgpu, msm)
• For Wayland: XDG_RUNTIME_DIR and WAYLAND_DISPLAY set

Known Issues

• PipeWire audio: Not yet working.