Matrix Homeserver on NixOS

• Prerequisites
• Setup
• Create Admin Account
• Verify
• Notes

Prerequisites

• NixOS installed
• Domain with DNS pointing to server (A record: matrix.yourdomain.com)
• Port 443, 8448 forwarded

Setup

1. Clone to /etc/nixos (or copy files)
2. Edit matrix.nix line 7: change enter-your-domain to your domain
3. Edit configuration.nix line 30: set your ACME email
4. Copy your hardware-configuration.nix into the directory
5. Rebuild:

nixos-rebuild switch --flake /etc/nixos#nixos-matrix

Create Admin Account

sudo matrix-synapse-register_new_matrix_user

Prompts for: username, password, admin (y/n)

Verify

systemctl status matrix-synapse postgresql nginx

Test federation: https://federationtester.matrix.org

Notes

• Registration disabled by default (enable_registration = false)
• SSL via Let's Encrypt (automatic)
• PostgreSQL configured automatically