* Hey, i have installed NixOS on a SD card for my Raspberry Pi 3, the SSH service doesn't start, here is my configurarion

`/etc/nixos/configuration.nix`
```nix
{ config, pkgs, lib, ... }:
{
        # ...

        # Configure basic SSH access
        services.openssh.enable = true;
        services.openssh.permitRootLogin = "yes";
}
```

that generates
```
cat /etc/systemd/system/sshd.service
[Unit]
After=network.target
Description=SSH Daemon
X-Restart-Triggers=/nix/store/j6239zzjq4maialrljaim0zn63gp2xf5-sshd.conf-validated

[Service]
Environment="LD_LIBRARY_PATH=/nix/store/6raw5p0db50yc6qaysz0wik4iwillni3-systemd-243.7/lib"
Environment="LOCALE_ARCHIVE=/nix/store/va88wa9plxgvp9vhv6py7m9rwynrkmb3-glibc-locales-2.30/lib/locale/locale-archive"
Environment="PATH=/nix/store/7wgx92yb2jxc3fqaplg8j5nickxfn4yi-openssh-8.2p1/bin:/nix/store/yy8hzn09pjx1a5j72b4hnhvqnjwmncpd-gawk-5.0.1/bin:/nix/store/v5rysi44wh8gg04sipjjvy9a0a6mh6an-coreutils-8.31/bin:/nix/store/9ah4diw4m78qzjdzrniglp7dm2v2a6ms-findutils-4.7.0/bin:/nix/store/2sj1rpyc9mz8w1w2pmaqpldd0sjhyx2i-gnugrep-3.4/bin:/nix/store/s9cmhbmn86z72vl6mxw1fdf5fsqppyiy-gnused-4.8/bin:/nix/store/6raw5p0db50yc6qaysz0wik4iwillni3-systemd-243.7/bin:/nix/store/7wgx92yb2jxc3fqaplg8j5nickxfn4yi-openssh-8.2p1/sbin:/nix/store/yy8hzn09pjx1a5j72b4hnhvqnjwmncpd-gawk-5.0.1/sbin:/nix/store/v5rysi44wh8gg04sipjjvy9a0a6mh6an-coreutils-8.31/sbin:/nix/store/9ah4diw4m78qzjdzrniglp7dm2v2a6ms-findutils-4.7.0/sbin:/nix/store/2sj1rpyc9mz8w1w2pmaqpldd0sjhyx2i-gnugrep-3.4/sbin:/nix/store/s9cmhbmn86z72vl6mxw1fdf5fsqppyiy-gnused-4.8/sbin:/nix/store/6raw5p0db50yc6qaysz0wik4iwillni3-systemd-243.7/sbin"
Environment="TZDIR=/nix/store/q291h27nj478nagzyanfwnf4sq07sprp-tzdata-2019c/share/zoneinfo"


X-StopIfChanged=false
ExecStart=/nix/store/7wgx92yb2jxc3fqaplg8j5nickxfn4yi-openssh-8.2p1/bin/sshd -f /etc/ssh/sshd_config
ExecStartPre=/nix/store/772njds76q7jmhkk7113jjcfq80rxgfc-unit-script-sshd-pre-start
KillMode=process
Restart=always
Type=simple
```

```sh
systemctl status sshd.service
● sshd.service - SSH Daemon
   Loaded: loaded (/nix/store/nyqx59s6hmjvj71wa3g3f8p18kyvpxbh-unit-sshd.service/sshd.service; linked; vendor preset: enabled)
   Active: inactive (dead)
```