diff --git a/home/home.nix b/home/home.nix
index 5f33ef5..bd129a3 100644
--- a/home/home.nix
+++ b/home/home.nix
@@ -42,7 +42,7 @@ let
     yate
     # split and merge PDFs in a GUI
     pdfarranger
-    transmission-qt
+    qbittorrent
     #(pkgs.pidgin-with-plugins.override {
     #    plugins = [ pkgs.pidginotr ];})
 
diff --git a/nixos/configuration.nix b/nixos/configuration.nix
index 2648468..f9ef8c1 100644
--- a/nixos/configuration.nix
+++ b/nixos/configuration.nix
@@ -240,11 +240,13 @@ in
   # Enable all sysrq functions (useful to recover from some issues):
   boot.kernel.sysctl."kernel.sysrq" = 1; # NixOS default: 16 (only the sync command)
 
-  # keep build-time deps around for offline-rebuilding
   nix.extraOptions = ''
+    # keep build-time deps around for offline-rebuilding
     gc-keep-outputs = true
     gc-keep-derivations = true
+
     trusted-users = spiollinux
+    experimental-features = nix-command
   '';
   # use all cores for building
   nix.buildCores = 0;