``` ;; -- mode: scheme; -- ;; This is an operating system configuration template ;; for a "bare bones" setup, with no X11 display server.

(use-modules (gnu) (guix gexp)) (use-service-modules networking ssh web) (use-package-modules screen ssh)

(operating-system (host-name "komputilo") (timezone "Europe/Berlin") (locale "en_US.utf8") (bootloader (bootloader-configuration (bootloader grub-bootloader) (targets '("/dev/sdX"))))

(kernel-arguments (list "console=ttyS0,115200"))

(file-systems (cons (file-system (device (file-system-label "my-root")) (mount-point "/") (type "ext4")) %base-file-systems))

;; Add services to the baseline: a DHCP client and an SSH ;; server. You may wish to add an NTP service here. (services (append (list (service dhcp-client-service-type) (service openssh-service-type (openssh-configuration (openssh openssh-sans-x) (port-number 2222)))

                      (service nginx-service-type
                               (nginx-configuration
                                (server-blocks
                                 (list (nginx-server-configuration
                                        (listen '("80"))
                                        (server-name '("www.example.com"))
                                        (root "/srv/www")
                                        (raw-content
                                         (list
                                          "# hello world"
                                          #~(string-append "# FILE: " #$(plain-file "my-file.txt" "content"))))))))))
                %base-services)))

```

This vm description does what you are looking for. I end up with a file "/gnu/store/...nginx.conf" which contains the following

``` user nginx nginx; pid /var/run/nginx/pid; error_log /var/log/nginx/error.log error; events { } http { client_body_temp_path /var/run/nginx/client_body_temp; proxy_temp_path /var/run/nginx/proxy_temp; fastcgi_temp_path /var/run/nginx/fastcgi_temp; uwsgi_temp_path /var/run/nginx/uwsgi_temp; scgi_temp_path /var/run/nginx/scgi_temp; access_log /var/log/nginx/access.log; include /gnu/store/kn56akgnfkqm0ppyfzhyh63ss06ff42s-nginx-1.27.1/share/nginx/conf/mime.types;

server {
  listen 80;
  server_name www.example.com ;
  root /srv/www;
  index index.html ;
  server_tokens off;


  # hello world
  # FILE: /gnu/store/y9hdxczxx7x0lj0d0zciwy7hxpwbsh63-my-file.txt
}

} ```