diff --git a/hosts/Disco.nix b/hosts/Disco.nix
index f1fdcbf..4c9cfda 100644
--- a/hosts/Disco.nix
+++ b/hosts/Disco.nix
@@ -45,6 +45,7 @@
         htop
         ncmpcpp
         usbutils  # lsusb etc.
+        nmap
         file exiftool binwalk
         shellcheck
 
@@ -79,6 +80,7 @@
         tor-browser-bundle-bin
         libreoffice-fresh
         tdesktop
+        signal-desktop
         horizon-eda
         kicad-small
         # cura
diff --git a/hosts/development.nix b/hosts/development.nix
index 7236f1a..52ca333 100644
--- a/hosts/development.nix
+++ b/hosts/development.nix
@@ -30,6 +30,9 @@
         # ST-LINK/V2
         SUBSYSTEM=="usb", ATTRS{idVendor}=="0483", ATTRS{idProduct}=="3748", MODE="0660", GROUP="plugdev"
 
+        # ST-LINK/V2.1
+        SUBSYSTEM=="usb", ATTRS{idVendor}=="0483", ATTRS{idProduct}=="3752", MODE="0660", GROUP="plugdev"
+
         # WCH-LinkE
         SUBSYSTEMS=="usb", ATTRS{idVendor}=="1a86", ATTRS{idProduct}=="8010", MODE="0660", GROUP="plugdev"
 
diff --git a/hosts/xfce.nix b/hosts/xfce.nix
index d2e996e..a9d5128 100644
--- a/hosts/xfce.nix
+++ b/hosts/xfce.nix
@@ -41,6 +41,7 @@
         hackneyed
         blueman
         file-roller
+        gnome-font-viewer
     ];
     security.pam.services.lightdm.enableGnomeKeyring = true;
     services.gnome.gnome-keyring.enable = true;