diff --git a/ctl.sh b/ctl.sh
index ae16b44..00e007d 100755
--- a/ctl.sh
+++ b/ctl.sh
@@ -7,6 +7,7 @@
 ##
 ##    test              Rebuild and test OS without new generation
 ##    rebuild           Rebuild OS and create new generation
+##    channel           Set release channel
 ##    upgrade           Upgrade channels and rebuild OS
 ##    changes           Show changes between generations
 ##    gc                Garbage collect old generations
@@ -54,6 +55,14 @@ function os {
 		sudo nix-channel --update
 		sudo nixos-rebuild --upgrade --flake ./os#${1} switch
 	}
+	function channel {
+		sudo nix-channel --list
+		if [ -n "${1}" ]; then
+			echo "Set channel to ${1}"
+			sudo nix-channel --remove nixos
+			sudo nix-channel --add https://nixos.org/channels/nixos-${1} nixos
+		fi
+	}
 	function changes {
 		nix profile diff-closures --profile /nix/var/nix/profiles/system
 	}
@@ -99,13 +108,13 @@ function shell {
 }
 
 function repl {
-    info
-    echo -e "\n${REDBOLD}Enter command...${EC}"
-    read -p '~> ';
+	info
+	echo -e "\n${REDBOLD}Enter command...${EC}"
+	read -p '~> '
 	clear
-    ./ctl.sh ${REPLY}
+	./ctl.sh ${REPLY}
 	read -p "Press any key to continue."
-    repl
+	repl
 }
 
 ${@:-info}
diff --git a/os/configuration.nix b/os/configuration.nix
index 7b8de4f..2b303e2 100644
--- a/os/configuration.nix
+++ b/os/configuration.nix
@@ -11,4 +11,8 @@
 
   system.stateVersion = "23.05";
 
+  nixpkgs.config.permittedInsecurePackages = [
+    "electron-24.8.6"
+  ];
+
 }
diff --git a/os/flake.lock b/os/flake.lock
index 08b64a3..b0b4e32 100644
--- a/os/flake.lock
+++ b/os/flake.lock
@@ -23,11 +23,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1688109178,
-        "narHash": "sha256-BSdeYp331G4b1yc7GIRgAnfUyaktW2nl7k0C577Tttk=",
+        "lastModified": 1704290814,
+        "narHash": "sha256-LWvKHp7kGxk/GEtlrGYV68qIvPHkU9iToomNFGagixU=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "b72aa95f7f096382bff3aea5f8fde645bca07422",
+        "rev": "70bdadeb94ffc8806c0570eb5c2695ad29f0e421",
         "type": "github"
       },
       "original": {
diff --git a/os/users/master.nix b/os/users/master.nix
index cbb07a4..50f90dd 100644
--- a/os/users/master.nix
+++ b/os/users/master.nix
@@ -37,6 +37,8 @@
       hunspell
       hunspellDicts.de_CH
       imagemagick
+      ledger-live-desktop
+      solana-cli
     ];
 
     programs = {
diff --git a/shell/python.nix b/shell/dev.nix
similarity index 100%
rename from shell/python.nix
rename to shell/dev.nix