diff --git a/nix/home/alacritty/alacritty.nix b/nix/home/alacritty/alacritty.nix
index 00ff1d2..5133911 100644
--- a/nix/home/alacritty/alacritty.nix
+++ b/nix/home/alacritty/alacritty.nix
@@ -95,7 +95,7 @@
       # window
       window = {
         opacity = 0.75;
-        class = {
+        class   = {
           general  = "Alacritty";
           instance = "Alacritty";
         };
diff --git a/nix/home/git/git.nix b/nix/home/git/git.nix
index 6acde8e..2d12536 100644
--- a/nix/home/git/git.nix
+++ b/nix/home/git/git.nix
@@ -3,10 +3,10 @@
   
   # git
   programs.git = {
-    enable = true;
-    userName = "Simon Cornet";
+    enable    = true;
+    userName  = "Simon Cornet";
     userEmail = "simon@simoncor.net";
-    aliases = {
+    aliases   = {
     
       # commit + message
       cam = "commit -am";
diff --git a/nix/home/ssh/ssh.nix b/nix/home/ssh/ssh.nix
index 7425635..03cad27 100644
--- a/nix/home/ssh/ssh.nix
+++ b/nix/home/ssh/ssh.nix
@@ -3,7 +3,7 @@
 
   # ssh
   programs.ssh = {
-    enable   = true;
+    enable      = true;
     matchBlocks = {
 
       # general
diff --git a/nix/home/theme/gtk.nix b/nix/home/theme/gtk.nix
index 6669abc..eb92ed6 100644
--- a/nix/home/theme/gtk.nix
+++ b/nix/home/theme/gtk.nix
@@ -23,7 +23,7 @@
 
     # theme
     theme = {
-      name = "Catppuccin-Macchiato-Standard-Sky-Dark";
+      name    = "Catppuccin-Macchiato-Standard-Sky-Dark";
       package = pkgs.catppuccin-gtk.override {
         accents = [ "sky" ];
         size    = "standard";
@@ -41,8 +41,8 @@
 
   # xdg settings
   xdg.configFile = {
-    "gtk-4.0/assets".source = "${config.gtk.theme.package}/share/themes/${config.gtk.theme.name}/gtk-4.0/assets";
-    "gtk-4.0/gtk.css".source = "${config.gtk.theme.package}/share/themes/${config.gtk.theme.name}/gtk-4.0/gtk.css";
+    "gtk-4.0/assets".source       = "${config.gtk.theme.package}/share/themes/${config.gtk.theme.name}/gtk-4.0/assets";
+    "gtk-4.0/gtk.css".source      = "${config.gtk.theme.package}/share/themes/${config.gtk.theme.name}/gtk-4.0/gtk.css";
     "gtk-4.0/gtk-dark.css".source = "${config.gtk.theme.package}/share/themes/${config.gtk.theme.name}/gtk-4.0/gtk-dark.css";
   };
 }
diff --git a/nix/home/virt-manager/virt-manager.nix b/nix/home/virt-manager/virt-manager.nix
index d112785..2773b33 100644
--- a/nix/home/virt-manager/virt-manager.nix
+++ b/nix/home/virt-manager/virt-manager.nix
@@ -5,7 +5,7 @@
   dconf.settings = {
     "org/virt-manager/virt-manager/connections" = {
       autoconnect = ["qemu:///system"];
-      uris = ["qemu:///system"];
+      uris        = ["qemu:///system"];
     };
   };
 }
diff --git a/nix/home/xdg/xdg.nix b/nix/home/xdg/xdg.nix
index fba0f24..881eb02 100644
--- a/nix/home/xdg/xdg.nix
+++ b/nix/home/xdg/xdg.nix
@@ -9,6 +9,10 @@
     enable = true;
     defaultApplications = {
 
+      # documents
+      "application/pdf"   = ["org.gnome.Evince.desktop"];
+      "application/x-pdf" = ["org.gnome.Evince.desktop"];
+
       # images
       "image/bmp"             = [ "org.gnome.Loupe.desktop" ];
       "image/gif"             = [ "org.gnome.Loupe.desktop" ];
diff --git a/nix/systems/bootloader.nix b/nix/systems/bootloader.nix
index d024e27..94fdf50 100644
--- a/nix/systems/bootloader.nix
+++ b/nix/systems/bootloader.nix
@@ -16,8 +16,8 @@
   };
 
   # make boot pretty
-  boot.plymouth.enable = true;
-  boot.kernelParams = [ "quiet" ];
+  boot.plymouth.enable       = true;
+  boot.kernelParams          = [ "quiet" ];
   boot.initrd.systemd.enable = true;
 
   # make console pretty
diff --git a/nix/systems/desktop.nix b/nix/systems/desktop.nix
index 2e58215..110cf2f 100644
--- a/nix/systems/desktop.nix
+++ b/nix/systems/desktop.nix
@@ -8,7 +8,7 @@
   };
 
   # xdg portals
-  xdg.portal.enable = true;
+  xdg.portal.enable       = true;
   xdg.portal.extraPortals = with pkgs; [
     xdg-desktop-portal-wlr
   ];
@@ -24,7 +24,7 @@
   };
 
   # gnome
-  services.xserver.displayManager.gdm.enable = true;
+  services.xserver.displayManager.gdm.enable   = true;
   services.xserver.desktopManager.gnome.enable = true;
 
   # hyprland
diff --git a/nix/systems/itclt75/hardware-configuration.nix b/nix/systems/itclt75/hardware-configuration.nix
index dcd533c..c91ec31 100644
--- a/nix/systems/itclt75/hardware-configuration.nix
+++ b/nix/systems/itclt75/hardware-configuration.nix
@@ -5,8 +5,7 @@
   imports = [ (modulesPath + "/installer/scan/not-detected.nix") ];
 
   # bootloader
-  boot.extraModulePackages = [ ];
-  boot.initrd.kernelModules = [ "kvm-intel" ];
+  boot.initrd.kernelModules          = [ "kvm-intel" ];
   boot.initrd.availableKernelModules = [ "xhci_pci" "thunderbolt" "nvme" "usb_storage" "sd_mod" "rtsx_pci_sdmmc" ];
   boot.initrd.luks = {
     devices = {
diff --git a/nix/systems/phaedra/hardware-configuration.nix b/nix/systems/phaedra/hardware-configuration.nix
index 40a77de..b171b1a 100644
--- a/nix/systems/phaedra/hardware-configuration.nix
+++ b/nix/systems/phaedra/hardware-configuration.nix
@@ -5,9 +5,7 @@
   imports = [ (modulesPath + "/installer/scan/not-detected.nix") ];
 
   # bootloader
-  boot.extraModulePackages = [ ];
-  boot.initrd.kernelModules = [ ];
-  boot.kernelModules = [ "kvm-amd" "amdgpu" ];
+  boot.kernelModules                 = [ "kvm-amd" "amdgpu" ];
   boot.initrd.availableKernelModules = [ "xhci_pci" "ahci" "usb_storage" "sd_mod" "rtsx_pci_sdmmc" ];
 
   # filesystems - boot
diff --git a/nix/systems/sound.nix b/nix/systems/sound.nix
index 173d12d..97f35ae 100644
--- a/nix/systems/sound.nix
+++ b/nix/systems/sound.nix
@@ -14,11 +14,11 @@
 
   # enable pipewire
   services.pipewire = {
+    enable       = true;
+    pulse.enable = true;
     alsa = {
       enable       = true;
       support32Bit = true;
     };
-    enable = true;
-    pulse.enable = true;
   };
 }
diff --git a/nix/systems/talathiel/hardware-configuration.nix b/nix/systems/talathiel/hardware-configuration.nix
index 2c1a0b8..aab69a4 100644
--- a/nix/systems/talathiel/hardware-configuration.nix
+++ b/nix/systems/talathiel/hardware-configuration.nix
@@ -5,9 +5,7 @@
   imports = [ (modulesPath + "/installer/scan/not-detected.nix") ];
 
   # bootloader
-  boot.extraModulePackages = [ ];
-  boot.initrd.kernelModules = [ ];
-  boot.kernelModules = [ "kvm-intel" ];
+  boot.initrd.kernelModules          = [ "kvm-intel" ];
   boot.initrd.availableKernelModules = [ "xhci_pci" "ahci" "usb_storage" "sd_mod" "rtsx_pci_sdmmc" ];
 
   # filesystems - boot