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# Edit this configuration file to define what should be installed on
# your system. Help is available in the configuration.nix(5) man page
# and in the NixOS manual (accessible by running nixos-help).
{ config, pkgs, ... }:
let
netifWan = "enp0s31f6";
netifLan = "enp3s0";
netifWifi = "wlp1s0";
netifSit = "henet0";
hydraWwwOutputs = "/var/www/hydra-outputs";
in
{
imports =
[
./hardware-configuration.nix
./backup-module.nix
./flarum.nix
(builtins.fetchTarball {
url = "https://gitlab.com/simple-nixos-mailserver/nixos-mailserver/-/archive/nixos-20.09/nixos-mailserver-nixos-20.09.tar.gz";
sha256 = "1cfzlfdfiw8347cgi0y4akj528lpwplhdpq3fv5rw7fb1zq2w6ib";
})
];
# Use the systemd-boot EFI boot loader.
boot.loader.systemd-boot.enable = true;
boot.loader.efi.canTouchEfiVariables = true;
boot.blacklistedKernelModules = ["iwlwifi"];
boot.supportedFilesystems = ["zfs"];
services.zfs.autoScrub.enable = true;
services.zfs.autoSnapshot.enable = true;
fileSystems."/tank" = {
device = "tank";
fsType = "zfs";
};
security.apparmor.enable = true;
networking = {
hostName = "nixbld";
hostId = "b82fb017";
firewall = {
allowedTCPPorts = [ 80 443 ];
allowedUDPPorts = [ 53 67 ];
trustedInterfaces = [ netifLan ];
};
interfaces."${netifLan}" = {
ipv4.addresses = [{
address = "192.168.1.1";
prefixLength = 24;
}];
ipv6.addresses = [{
address = "2001:470:f821:1::";
prefixLength = 64;
}];
};
interfaces."${netifWifi}" = {
ipv4.addresses = [{
address = "192.168.12.1";
prefixLength = 24;
}];
ipv6.addresses = [{
address = "2001:470:f821:2::";
prefixLength = 64;
}];
};
nat = {
enable = true;
externalInterface = netifWan;
internalInterfaces = [ netifLan netifWifi ];
forwardPorts = [
{ sourcePort = 2201; destination = "192.168.1.201:22"; proto = "tcp"; }
{ sourcePort = 2202; destination = "192.168.1.202:22"; proto = "tcp"; }
{ sourcePort = 2203; destination = "192.168.1.203:22"; proto = "tcp"; }
{ sourcePort = 2204; destination = "192.168.1.204:22"; proto = "tcp"; }
{ sourcePort = 2205; destination = "192.168.1.205:22"; proto = "tcp"; }
];
extraCommands = ''
iptables -w -N block-lan-from-wifi
iptables -w -A block-lan-from-wifi -i ${netifLan} -o ${netifWifi} -j DROP
iptables -w -A block-lan-from-wifi -i ${netifWifi} -o ${netifLan} -j DROP
iptables -w -A FORWARD -j block-lan-from-wifi
'';
extraStopCommands = ''
iptables -w -D FORWARD -j block-lan-from-wifi 2>/dev/null|| true
iptables -w -F block-lan-from-wifi 2>/dev/null|| true
iptables -w -X block-lan-from-wifi 2>/dev/null|| true
'';
};
sits."${netifSit}" = {
dev = netifWan;
remote = "216.218.221.6";
local = "42.200.147.171";
ttl = 255;
};
interfaces."${netifSit}".ipv6 = {
addresses = [{ address = "2001:470:18:629::2"; prefixLength = 64; }];
routes = [{ address = "::"; prefixLength = 0; }];
};
};
boot.kernel.sysctl."net.ipv6.conf.all.forwarding" = "1";
boot.kernel.sysctl."net.ipv6.conf.default.forwarding" = "1";
services.unbound = {
enable = true;
extraConfig =
''
server:
port: 5353
'';
};
services.hostapd = {
enable = true;
interface = netifWifi;
hwMode = "g";
ssid = "M-Labs";
wpaPassphrase = (import /etc/nixos/secret/wifi_password.nix);
extraConfig = ''
ieee80211d=1
country_code=HK
ieee80211n=1
wmm_enabled=1
auth_algs=1
wpa_key_mgmt=WPA-PSK
rsn_pairwise=CCMP
'';
};
services.dnsmasq = {
enable = true;
servers = ["::1#5353"];
extraConfig = ''
interface=${netifLan}
interface=${netifWifi}
bind-interfaces
dhcp-range=interface:${netifLan},192.168.1.81,192.168.1.254,24h
dhcp-range=interface:${netifWifi},192.168.12.10,192.168.12.254,24h
enable-ra
dhcp-range=interface:${netifLan},::,constructor:${netifLan},ra-names
dhcp-range=interface:${netifWifi},::,constructor:${netifWifi},ra-only
no-resolv
# Static IPv4s to make Red Pitayas with factory firmware less annoying
dhcp-host=rp-f05cc9,192.168.1.190
dhcp-host=rp-f0612e,192.168.1.191
# Static IPv4s to make port redirections work
dhcp-host=rpi-1,192.168.1.201
dhcp-host=rpi-2,192.168.1.202
dhcp-host=rpi-3,192.168.1.203
dhcp-host=rpi-4,192.168.1.204
dhcp-host=rpi-5,192.168.1.205
# Static IP addresses for non-DHCP boards
address=/thermostat/192.168.1.26
address=/powercycler/192.168.1.31
address=/kc705/192.168.1.50
address=/zynq-experiments/192.168.1.51
address=/zc706/192.168.1.52
address=/zc706-2/192.168.1.53
address=/cora-z7/192.168.1.54
address=/rust-pitaya/192.168.1.55
address=/sayma/192.168.1.60
address=/metlino/192.168.1.65
address=/kasli/192.168.1.70
address=/kasli-customer/192.168.1.75
address=/stabilizer-customer/192.168.1.76
# uTCA MCH from NAT
address=/tschernobyl/192.168.1.80
'';
};
# Select internationalisation properties.
i18n.defaultLocale = "en_US.UTF-8";
console = {
font = "Lat2-Terminus16";
keyMap = "de";
};
# Set your time zone.
time.timeZone = "Asia/Hong_Kong";
# List packages installed in system profile. To search, run:
# $ nix search wget
environment.systemPackages = with pkgs; [
wget vim git file lm_sensors acpi pciutils psmisc telnet nixops
irssi tmux usbutils imagemagick jq zip unzip
];
# Some programs need SUID wrappers, can be configured further or are
# started in user sessions.
# programs.mtr.enable = true;
# programs.gnupg.agent = { enable = true; enableSSHSupport = true; };
# List services that you want to enable:
services.apcupsd.enable = true;
services.apcupsd.configText = ''
UPSTYPE usb
NISIP 127.0.0.1
BATTERYLEVEL 10
MINUTES 5
'';
# Enable the OpenSSH daemon.
services.openssh.enable = true;
services.openssh.forwardX11 = true;
services.openssh.passwordAuthentication = false;
programs.mosh.enable = true;
programs.fish.enable = true;
# Enable CUPS to print documents.
services.avahi.enable = true;
services.avahi.interfaces = [ netifLan ];
services.avahi.publish.enable = true;
services.avahi.publish.userServices = true;
nixpkgs.config.allowUnfree = true;
services.printing.enable = true;
services.printing.drivers = [ pkgs.hplipWithPlugin ];
services.printing.browsing = true;
services.printing.listenAddresses = [ "*:631" ];
services.printing.defaultShared = true;
hardware.sane.enable = true;
hardware.sane.extraBackends = [ pkgs.hplipWithPlugin ];
users.extraGroups.hkadmin = { };
users.extraUsers.sb = {
isNormalUser = true;
extraGroups = ["wheel" "hkadmin" "lp" "scanner"];
openssh.authorizedKeys.keys = [
"ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCyPk5WyFoWSvF4ozehxcVBoZ+UHgrI7VW/OoQfFFwIQe0qvetUZBMZwR2FwkLPAMZV8zz1v4EfncudEkVghy4P+/YVLlDjqDq9zwZnh8Nd/ifu84wmcNWHT2UcqnhjniCdshL8a44memzABnxfLLv+sXhP2x32cJAamo5y6fukr2qLp2jbXzR+3sv3klE0ruUXis/BR1lLqNJEYP8jB6fLn2sLKinnZPfn6DwVOk10mGeQsdME/eGl3phpjhODH9JW5V2V5nJBbC0rBnq+78dyArKVqjPSmIcSy72DEIpTctnMEN1W34BGrnsDd5Xd/DKxKxHKTMCHtZRwLC2X0NWN"
"ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCMALVC8RDTHec+PC8y1s3tcpUAODgq6DEzQdHDf/cyvDMfmCaPiMxfIdmkns5lMa03hymIfSmLUF0jFFDc7biRp7uf9AAXNsrTmplHii0l0McuOOZGlSdZM4eL817P7UwJqFMxJyFXDjkubhQiX6kp25Kfuj/zLnupRCaiDvE7ho/xay6Jrv0XLz935TPDwkc7W1asLIvsZLheB+sRz9SMOb9gtrvk5WXZl5JTOFOLu+JaRwQLHL/xdcHJTOod7tqHYfpoC5JHrEwKzbhTOwxZBQBfTQjQktKENQtBxXHTe71rUEWfEZQGg60/BC4BrRmh4qJjlJu3v4VIhC7SSHn1"
];
shell = pkgs.fish;
};
users.extraUsers.rj = {
isNormalUser = true;
extraGroups = ["wheel"];
};
users.extraUsers.harry = {
isNormalUser = true;
extraGroups = ["hkadmin" "lp" "scanner"];
openssh.authorizedKeys.keys = [
"ecdsa-sha2-nistp384 AAAAE2VjZHNhLXNoYTItbmlzdHAzODQAAAAIbmlzdHAzODQAAABhBDcPNCgtdz8erFPRrAwCr4JrkeYXJUUvoRBgP0X2HlzJgDe1Inuo6sC6CGcO3IXbf4MwVA9XEp8BYPHARVeEHhufg/0wnIABLx2GcK99yxOLDUe4h/3YwtqvOcqHEsDx7w=="
];
};
users.extraUsers.nix = {
isNormalUser = true;
};
security.sudo.wheelNeedsPassword = false;
security.hideProcessInformation = true;
boot.kernel.sysctl."kernel.dmesg_restrict" = true;
services.udev.packages = [ pkgs.sane-backends ];
nix.distributedBuilds = true;
nix.buildMachines = [
{
hostName = "localhost";
maxJobs = 4;
system = "x86_64-linux";
supportedFeatures = ["big-parallel"];
}
{
hostName = "rpi-3";
sshUser = "nix";
sshKey = "/etc/nixos/secret/nix_id_rsa";
maxJobs = 1;
system = "aarch64-linux";
}
];
services.hydra = {
enable = true;
package = pkgs.hydra-unstable;
useSubstitutes = true;
hydraURL = "https://nixbld.m-labs.hk";
notificationSender = "hydra@m-labs.hk";
minimumDiskFree = 15; # in GB
minimumDiskFreeEvaluator = 1;
extraConfig =
''
binary_cache_secret_key_file = /etc/nixos/secret/nixbld.m-labs.hk-1
max_output_size = 10000000000
<runcommand>
job = web:web:web
command = [ $(jq '.buildStatus' < $HYDRA_JSON) = 0 ] && ln -sfn $(jq -r '.outputs[0].path' < $HYDRA_JSON) ${hydraWwwOutputs}/web
</runcommand>
<runcommand>
job = artiq:full:sipyco-manual-html
command = [ $(jq '.buildStatus' < $HYDRA_JSON) = 0 ] && ln -sfn $(jq -r '.outputs[0].path' < $HYDRA_JSON) ${hydraWwwOutputs}/sipyco-manual-html
</runcommand>
<runcommand>
job = artiq:full:sipyco-manual-latexpdf
command = [ $(jq '.buildStatus' < $HYDRA_JSON) = 0 ] && ln -sfn $(jq -r '.outputs[0].path' < $HYDRA_JSON) ${hydraWwwOutputs}/sipyco-manual-latexpdf
</runcommand>
<runcommand>
job = artiq:full-beta:artiq-manual-html
command = [ $(jq '.buildStatus' < $HYDRA_JSON) = 0 ] && ln -sfn $(jq -r '.outputs[0].path' < $HYDRA_JSON) ${hydraWwwOutputs}/artiq-manual-html-beta
</runcommand>
<runcommand>
job = artiq:full-beta:artiq-manual-latexpdf
command = [ $(jq '.buildStatus' < $HYDRA_JSON) = 0 ] && ln -sfn $(jq -r '.outputs[0].path' < $HYDRA_JSON) ${hydraWwwOutputs}/artiq-manual-latexpdf-beta
</runcommand>
<runcommand>
job = artiq:full-beta:conda-channel
command = [ $(jq '.buildStatus' < $HYDRA_JSON) = 0 ] && ln -sfn $(jq -r '.outputs[0].path' < $HYDRA_JSON) ${hydraWwwOutputs}/artiq-conda-channel-beta
</runcommand>
<runcommand>
job = artiq:full:artiq-manual-html
command = [ $(jq '.buildStatus' < $HYDRA_JSON) = 0 ] && ln -sfn $(jq -r '.outputs[0].path' < $HYDRA_JSON) ${hydraWwwOutputs}/artiq-manual-html
</runcommand>
<runcommand>
job = artiq:full:artiq-manual-latexpdf
command = [ $(jq '.buildStatus' < $HYDRA_JSON) = 0 ] && ln -sfn $(jq -r '.outputs[0].path' < $HYDRA_JSON) ${hydraWwwOutputs}/artiq-manual-latexpdf
</runcommand>
<runcommand>
job = artiq:full:conda-channel
command = [ $(jq '.buildStatus' < $HYDRA_JSON) = 0 ] && ln -sfn $(jq -r '.outputs[0].path' < $HYDRA_JSON) ${hydraWwwOutputs}/artiq-conda-channel
</runcommand>
<githubstatus>
jobs = artiq:fast.*:extended-tests
inputs = artiqSrc
useShortContext = 1
authorization = token ${(import /etc/nixos/secret/github_tokens.nix).artiq}
</githubstatus>
'';
};
systemd.services.hydra-www-outputs-init = {
description = "Set up a hydra-owned directory for build outputs";
wantedBy = [ "multi-user.target" ];
requiredBy = [ "hydra-queue-runner.service" ];
before = [ "hydra-queue-runner.service" ];
serviceConfig = {
Type = "oneshot";
ExecStart = [ "${pkgs.coreutils}/bin/mkdir -p ${hydraWwwOutputs}" "${pkgs.coreutils}/bin/chown hydra-queue-runner:hydra ${hydraWwwOutputs}" ];
};
};
nix.extraOptions = ''
secret-key-files = /etc/nixos/secret/nixbld.m-labs.hk-1
'';
nix.sandboxPaths = ["/opt"];
services.munin-node.enable = true;
services.munin-cron = {
enable = true;
hosts = ''
[${config.networking.hostName}]
address localhost
'';
};
services.mlabs-backup.enable = true;
services.gitea = {
enable = true;
httpPort = 3001;
rootUrl = "https://git.m-labs.hk/";
appName = "M-Labs Git";
cookieSecure = true;
disableRegistration = true;
mailerPasswordFile = "/etc/nixos/secret/mailerpassword";
settings = {
indexer = {
REPO_INDEXER_ENABLED = true;
};
mailer = {
ENABLED = true;
HOST = "ssl.serverraum.org:587";
FROM = "sysop@m-labs.hk";
USER = "sysop@m-labs.hk";
};
service = {
ENABLE_NOTIFY_MAIL = true;
};
attachment = {
ALLOWED_TYPES = "*/*";
};
};
};
systemd.tmpfiles.rules = [
"L+ '${config.services.gitea.stateDir}/custom/templates/home.tmpl' - - - - ${./gitea-home.tmpl}"
];
services.mattermost = {
enable = true;
siteUrl = "https://chat.m-labs.hk/";
mutableConfig = true;
};
services.matterbridge = {
enable = true;
configPath = "/etc/nixos/secret/matterbridge.toml";
};
nixpkgs.config.packageOverrides = super: let self = super.pkgs; in {
nix = super.nix.overrideAttrs(oa: {
patches = oa.patches or [] ++ [ ./nix-networked-derivations.diff ];
});
nixFlakes = super.nixFlakes.overrideAttrs(oa: {
patches = oa.patches or [] ++ [ ./nix-3-networked-derivations.patch ];
});
hydra-unstable = super.hydra-unstable.overrideAttrs(oa: {
patches = oa.patches or [] ++ [
./hydra-conda.patch
./hydra-unbreak-sysbuild.patch
./hydra-restrictdist.patch
];
hydraPath = oa.hydraPath + ":" + super.lib.makeBinPath [ super.jq ];
});
matterbridge = super.matterbridge.overrideAttrs(oa: {
patches = oa.patches or [] ++ [ ./matterbridge-disable-github.patch ];
});
};
security.acme.acceptTerms = true;
security.acme.email = "sb" + "@m-labs.hk";
security.acme.certs = {
"nixbld.m-labs.hk" = {
group = "nginx";
webroot = "/var/lib/acme/acme-challenge";
extraDomainNames = [
"m-labs.hk"
"www.m-labs.hk"
"conda.m-labs.hk"
"lab.m-labs.hk"
"git.m-labs.hk"
"chat.m-labs.hk"
"hooks.m-labs.hk"
"forum.m-labs.hk"
"perso.m-labs.hk"
"call.m-labs.hk"
"nmigen.org"
"www.nmigen.org"
];
};
};
services.nginx = {
enable = true;
recommendedProxySettings = true;
recommendedGzipSettings = true;
virtualHosts = let
mainWebsite = {
addSSL = true;
useACMEHost = "nixbld.m-labs.hk";
root = "${hydraWwwOutputs}/web";
extraConfig = ''
error_page 404 /404.html;
'';
locations."^~ /fonts/".extraConfig = ''
expires 60d;
'';
locations."^~ /js/".extraConfig = ''
expires 60d;
'';
locations."/MathJax/" = {
alias = "/var/www/MathJax/";
extraConfig = ''
expires 60d;
'';
};
# legacy URLs, redirect to avoid breaking people's bookmarks
locations."/gateware.html".extraConfig = ''
return 301 /gateware/migen/;
'';
locations."/migen".extraConfig = ''
return 301 /gateware/migen/;
'';
locations."/artiq".extraConfig = ''
return 301 /experiment-control/artiq/;
'';
locations."/artiq/resources.html".extraConfig = ''
return 301 /experiment-control/resources/;
'';
# autogenerated manuals
locations."/artiq/sipyco-manual/" = {
alias = "${hydraWwwOutputs}/sipyco-manual-html/share/doc/sipyco-manual/html/";
};
locations."=/artiq/sipyco-manual.pdf" = {
alias = "${hydraWwwOutputs}/sipyco-manual-latexpdf/share/doc/sipyco-manual/SiPyCo.pdf";
};
locations."/artiq/manual-beta/" = {
alias = "${hydraWwwOutputs}/artiq-manual-html-beta/share/doc/artiq-manual/html/";
};
locations."=/artiq/manual-beta.pdf" = {
alias = "${hydraWwwOutputs}/artiq-manual-latexpdf-beta/share/doc/artiq-manual/ARTIQ.pdf";
};
locations."/artiq/manual/" = {
alias = "${hydraWwwOutputs}/artiq-manual-html/share/doc/artiq-manual/html/";
};
locations."=/artiq/manual.pdf" = {
alias = "${hydraWwwOutputs}/artiq-manual-latexpdf/share/doc/artiq-manual/ARTIQ.pdf";
};
# legacy content
locations."/migen/manual/" = {
alias = "/var/www/m-labs.hk.old/migen/manual/";
};
locations."/artiq/manual-release-4/" = {
alias = "/var/www/m-labs.hk.old/artiq/manual-release-4/";
};
locations."/artiq/manual-release-3/" = {
alias = "/var/www/m-labs.hk.old/artiq/manual-release-3/";
};
locations."/artiq/manual-release-2/" = {
alias = "/var/www/m-labs.hk.old/artiq/manual-release-2/";
};
};
in {
"m-labs.hk" = mainWebsite;
"www.m-labs.hk" = mainWebsite;
"lab.m-labs.hk" = {
addSSL = true;
useACMEHost = "nixbld.m-labs.hk";
locations."/munin/".alias = "/var/www/munin/";
locations."/munin".extraConfig = ''
auth_basic "Munin";
auth_basic_user_file /etc/nixos/secret/muninpasswd;
'';
};
"nixbld.m-labs.hk" = {
forceSSL = true;
useACMEHost = "nixbld.m-labs.hk";
locations."/".proxyPass = "http://127.0.0.1:3000";
};
"conda.m-labs.hk" = {
forceSSL = true;
useACMEHost = "nixbld.m-labs.hk";
locations."/artiq-beta/" = {
alias = "${hydraWwwOutputs}/artiq-conda-channel-beta/";
extraConfig = ''
autoindex on;
index bogus_index_file;
'';
};
locations."/artiq/" = {
alias = "${hydraWwwOutputs}/artiq-conda-channel/";
extraConfig = ''
autoindex on;
index bogus_index_file;
'';
};
};
"git.m-labs.hk" = {
forceSSL = true;
useACMEHost = "nixbld.m-labs.hk";
locations."/".proxyPass = "http://127.0.0.1:3001";
extraConfig = ''
client_max_body_size 300M;
'';
};
"chat.m-labs.hk" = {
forceSSL = true;
useACMEHost = "nixbld.m-labs.hk";
locations."/".proxyPass = "http://127.0.0.1:8065";
locations."~ /api/v[0-9]+/(users/)?websocket$".proxyPass = "http://127.0.0.1:8065";
locations."~ /api/v[0-9]+/(users/)?websocket$".proxyWebsockets = true;
};
"hooks.m-labs.hk" = {
forceSSL = true;
useACMEHost = "nixbld.m-labs.hk";
locations."/mattermost-github".extraConfig = ''
include ${pkgs.nginx}/conf/uwsgi_params;
uwsgi_pass unix:${config.services.uwsgi.runDir}/uwsgi-mgi.sock;
'';
locations."/rfq".extraConfig = ''
include ${pkgs.nginx}/conf/uwsgi_params;
uwsgi_pass unix:${config.services.uwsgi.runDir}/uwsgi-rfq.sock;
'';
};
"forum.m-labs.hk" = {
forceSSL = true;
useACMEHost = "nixbld.m-labs.hk";
root = "${config.services.flarum.installPath}/public";
locations."~ \.php$".extraConfig = ''
fastcgi_pass unix:${config.services.phpfpm.pools.flarum.socket};
fastcgi_index index.php;
'';
extraConfig = ''
index index.php;
include ${config.services.flarum.installPath}/.nginx.conf;
'';
};
"call.m-labs.hk" = {
useACMEHost = "nixbld.m-labs.hk";
enableACME = false;
forceSSL = true;
};
"perso.m-labs.hk" = {
addSSL = true;
useACMEHost = "nixbld.m-labs.hk";
root = "/var/www/perso";
};
"nmigen.org" = {
addSSL = true;
useACMEHost = "nixbld.m-labs.hk";
locations."/".extraConfig = ''
return 307 https://m-labs.hk/gateware/nmigen/;
'';
};
"www.nmigen.org" = {
addSSL = true;
useACMEHost = "nixbld.m-labs.hk";
locations."/".extraConfig = ''
return 307 https://m-labs.hk/gateware/nmigen/;
'';
};
};
};
services.uwsgi = {
enable = true;
plugins = [ "python3" ];
instance = {
type = "emperor";
vassals = {
mattermostgithub = import ./mattermost-github-integration/uwsgi-config.nix { inherit config pkgs; };
rfq = import ./rfq/uwsgi-config.nix { inherit config pkgs; };
};
};
};
services.mysql = {
enable = true;
package = pkgs.mariadb;
};
services.phpfpm.pools.flarum = {
user = config.services.flarum.user;
settings = {
"listen.owner" = "nginx";
"listen.group" = "nginx";
"listen.mode" = "0600";
"pm" = "dynamic";
"pm.max_children" = 5;
"pm.start_servers" = 2;
"pm.min_spare_servers" = 1;
"pm.max_spare_servers" = 3;
"pm.max_requests" = 500;
};
};
services.jitsi-meet = {
enable = true;
hostName = "call.m-labs.hk";
};
services.jitsi-videobridge.openFirewall = true;
mailserver = {
enable = true;
localDnsResolver = false; # conflicts with dnsmasq
# Some mail servers do reverse DNS lookups to filter spam.
# Getting a proper reverse DNS record from ISP is difficult, so use whatever already exists.
fqdn = "42-200-147-171.static.imsbiz.com";
domains = [ "nmigen.org" ];
loginAccounts = (import /etc/nixos/secret/email_accounts.nix);
certificateScheme = 3;
};
security.acme.certs."${config.mailserver.fqdn}".extraDomainNames = [ "mail.nmigen.org" ];
# This value determines the NixOS release with which your system is to be
# compatible, in order to avoid breaking some software such as database
# servers. You should change this only after NixOS release notes say you
# should.
system.stateVersion = "18.09"; # Did you read the comment?
}