* System
#+begin_src scheme
  ;; Indicate which modules to import to access the variables
  ;; used in this configuration.

  (define-module (hermes)
    #:use-module (gnu)
    #:use-module (srfi srfi-1)
    #:use-module (gnu system nss)
    #:use-module (gnu services pm)
    #:use-module (gnu services ssh)
    #:use-module (gnu services cups)
    #:use-module (gnu services guix)
    #:use-module (gnu services desktop)
    #:use-module (gnu services docker)
    #:use-module (gnu services networking)
    #:use-module (gnu services virtualization)
    #:use-module (gnu packages wm)
    #:use-module (gnu packages cups)
    #:use-module (gnu packages vim)
    #:use-module (gnu packages gtk)
    #:use-module (gnu packages xorg)
    #:use-module (gnu packages emacs)
    #:use-module (gnu packages file-systems)
    #:use-module (gnu packages gnome)
    #:use-module (gnu packages mtools)
    #:use-module (gnu packages linux)
    #:use-module (gnu packages audio)
    #:use-module (gnu packages gnuzilla)
    #:use-module (gnu packages web-browsers)
    #:use-module (gnu packages version-control)
    #:use-module (gnu packages package-management)
    #:use-module (gnu packages linux)
    #:use-module (gnu packages admin)
    #:use-module (nongnu packages linux)
    #:use-module (nongnu system linux-initrd))


  (use-service-modules cups desktop networking ssh xorg)

  (operating-system
   (host-name "hermes")
 
   (kernel linux)
   (firmware (list linux-firmware))
   (initrd microcode-initrd)

   (kernel-loadable-modules (list v4l2loopback-linux-module))
 
   (locale "en_US.utf8")
   (timezone "Europe/Athens")
   (keyboard-layout (keyboard-layout "us"
				     #:options
				     '("ctrl:nocaps")))

   ;; The list of user accounts ('root' is implicit).
   (users (cons (user-account
		 (name "apollo")
		 (comment "Thanos Apollo")
		 (group "users")
		 (home-directory "/home/apollo")
		 (supplementary-groups '("wheel"  ;; sudo
					 "netdev" ;; network devices
					 "kvm"
					 "tty"
					 "input"
					 "realtime" ;; Enable realtime scheduling
					 "lp"       ;; control bluetooth devices
					 "audio"    ;; control audio devices
					 "video"))) ;; control video devices
		%base-user-accounts))

   ;; Add the 'realtime' group
   (groups (cons (user-group (system? #t) (name "realtime"))
		 %base-groups))

   ;; Packages installed system-wide.  Users can also install packages
   ;; under their own account: use 'guix search KEYWORD' to search
   ;; for packages and 'guix install PACKAGE' to install a package.
   (packages (append (map specification->package
			  `("emacs-exwm"	
			    "emacs-desktop-environment"
			    "emacs"
			    "emacs-guix"
			    "emacs-vterm"
			    "emacs-dashboard"
			    "emacs-multi-vterm"
			    "emacs-pdf-tools"
			    "emacs-stumpwm-mode"
			    "stumpish"
			    "xrandr"
			    "picom"
			    "gnome"
			    "gnome-desktop"
			    "nss-certs"
			    "python"
			    "bind"
			    "alacritty"
			    "emacs-vterm"
			    "emacs-multi-vterm"
			    "alsa-utils"
			    "bluez-alsa"
			    "gnome-bluetooth"
			    "blueman"
			    "qtile"
			    "git"
			    "stumpwm"
			    "rofi"
			    "qemu"
			    "libvirt"
			    "virt-manager"			  
			    "font-jetbrains-mono"))
		     %base-packages))

   ;; Below is the list of system services.  To search for available
   ;; services, run 'guix system search KEYWORD' in a terminal.
   (services
    (append (list (service gnome-desktop-service-type)		 
		  (service openssh-service-type)
		  (service bluetooth-service-type)
		  (service cups-service-type)
		  (set-xorg-configuration
		   (xorg-configuration (keyboard-layout keyboard-layout)))
		  )
	    ;; This is the default list of services we
	    ;; are appending to.
	    %desktop-services))
 

 
   (bootloader (bootloader-configuration
		(bootloader grub-efi-bootloader)
		(targets (list "/boot/efi"))
		(keyboard-layout keyboard-layout)))
   (mapped-devices (list (mapped-device
			  (source (uuid
				   "0594b592-ddcb-4a3c-958d-c773d7a85d93"))
			  (target "cryptroot")
			  (type luks-device-mapping))
			 (mapped-device
			  (source (uuid
				   "a44f40ec-94c3-457a-a9ed-5db5396f3aea"))
			  (target "crypthome")
			  (type luks-device-mapping))))

   ;; The list of file systems that get "mounted".  The unique
   ;; file system identifiers there ("UUIDs") can be obtained
   ;; by running 'blkid' in a terminal.
   (file-systems (cons* (file-system
			 (mount-point "/boot/efi")
			 (device (uuid "98B8-B93E"
				       'fat32))
			 (type "vfat"))
			(file-system
			 (mount-point "/")
			 (device "/dev/mapper/cryptroot")
			 (type "ext4")
			 (dependencies mapped-devices))
			(file-system
			 (mount-point "/home")
			 (device "/dev/mapper/crypthome")
			 (type "ext4")
			 (dependencies mapped-devices))
			(file-system
			 (mount-point "/home/apollo/external")
			 (device "/dev/sda1")
			 (type "ext4")
			 (dependencies mapped-devices))
			%base-file-systems)))
#+end_src
* Channels
#+begin_src scheme
  (cons*
   (channel
    (name 'guix)
    (url "https://git.savannah.gnu.org/git/guix.git")
    (branch "master")
    (introduction
     (make-channel-introduction
      "9edb3f66fd807b096b48283debdcddccfea34bad"
      (openpgp-fingerprint
       "BBB0 2DDF 2CEA F6A8 0D1D  E643 A2A0 6DF2 A33A 54FA"))))
   (channel
    (name 'nonguix)
    (url "https://gitlab.com/nonguix/nonguix")
    ;; Enable signature verification:
    (introduction
     (make-channel-introduction
      "897c1a470da759236cc11798f4e0a5f7d4d59fbc"
      (openpgp-fingerprint
       "2A39 3FFF 68F4 EF7A 3D29  12AF 6F51 20A0 22FB B2D5"))))
   %default-channels)
#+end_src