diff --git a/systems/PC-Fixe/configuration.nix b/systems/PC-Fixe/configuration.nix
index 4710a8382..eaacc7708 100644
--- a/systems/PC-Fixe/configuration.nix
+++ b/systems/PC-Fixe/configuration.nix
@@ -12,7 +12,7 @@
       ../common-gui.nix
     ];
 
-  nix.trustedUsers = [ "root" "paul" ];
+  nix.settings.trusted-users = [ "root" "paul" ];
 
   boot.loader.efi.canTouchEfiVariables = true;
   boot.loader.grub = {
diff --git a/systems/PC-Fixe/hardware-configuration.nix b/systems/PC-Fixe/hardware-configuration.nix
index 5d505050b..1547b63d3 100644
--- a/systems/PC-Fixe/hardware-configuration.nix
+++ b/systems/PC-Fixe/hardware-configuration.nix
@@ -50,6 +50,6 @@
 
   swapDevices = [ ];
 
-  nix.maxJobs = lib.mkDefault 12;
+  nix.settings.max-jobs = lib.mkDefault 12;
   powerManagement.cpuFreqGovernor = lib.mkDefault "ondemand";
 }
diff --git a/systems/common-gui.nix b/systems/common-gui.nix
index dd00f9455..216a765ec 100644
--- a/systems/common-gui.nix
+++ b/systems/common-gui.nix
@@ -39,7 +39,7 @@
     ark
     kate
     kmail
-    kdeconnect
+    plasma5Packages.kdeconnect-kde
     okular
     yakuake
     konversation