diff --git a/nix/pkgs/default.nix b/nix/pkgs/default.nix
index a5fe44c..84a76b7 100644
--- a/nix/pkgs/default.nix
+++ b/nix/pkgs/default.nix
@@ -9,7 +9,7 @@ in
   build-glove80 = callPackage ./build-glove80.nix { };
   notes = callPackage ./notes.nix { };
   i3-battery-popup = callPackage ./i3-battery-popup.nix { };
-  tmux-sessionizer = callPackage ./tmux-sessionizer.nix { };
+  tmux-sessionizer = callPackage ./tmux-sessionizer { };
   upload-to-files = callPackage ./upload-to-files.nix { };
 
   vimPlugins = prev.vimPlugins // vimPlugins;
diff --git a/nix/pkgs/tmux-sessionizer.nix b/nix/pkgs/tmux-sessionizer.nix
deleted file mode 100644
index 1590b6a..0000000
--- a/nix/pkgs/tmux-sessionizer.nix
+++ /dev/null
@@ -1,59 +0,0 @@
-{ pkgs }:
-
-pkgs.writeShellApplication {
-  name = "tmux-sessionizer";
-
-  runtimeInputs = with pkgs; [ tmux ];
-
-  text = ''
-    set +o nounset
-
-    # Based on https://github.com/ThePrimeagen/tmux-sessionizer.
-
-    switch_to() {
-      if [[ -z $TMUX ]]; then
-        tmux attach-session -t "$1"
-      else
-        tmux switch-client -t "$1"
-      fi
-    }
-
-    has_session() {
-      tmux list-sessions | grep -q "^$1:"
-    }
-
-    hydrate() {
-      if [ -f "$2/.tmux-sessionizer" ]; then
-        tmux send-keys -t "$1" "source $2/.tmux-sessionizer" Enter
-      elif [ -f "$HOME/.tmux-sessionizer" ]; then
-        tmux send-keys -t "$1" "source $HOME/.tmux-sessionizer" Enter
-      fi
-    }
-
-    if [[ $# -eq 1 ]]; then
-      selected=$1
-    else
-      selected=$(find -L ~/ ~/Code ~/Code/personal ~/Code/os ~/Documents -mindepth 1 -maxdepth 1 -type d ! -name "*.old" | fzf)
-    fi
-
-    if [[ -z "$selected" ]]; then
-      exit 0
-    fi
-
-    selected_name="$(basename "$selected" | tr . _)"
-    tmux_running="$(pgrep tmux)"
-
-    if [[ -z $TMUX ]] && [[ -z "$tmux_running" ]]; then
-      tmux new-session -s "$selected_name" -c "$selected"
-      hydrate "$selected_name" "$selected"
-      exit 0
-    fi
-
-    if ! has_session "$selected_name"; then
-      tmux new-session -ds "$selected_name" -c "$selected"
-      hydrate "$selected_name" "$selected"
-    fi
-
-    switch_to "$selected_name"
-  '';
-}
diff --git a/nix/pkgs/tmux-sessionizer/configure-directories.patch b/nix/pkgs/tmux-sessionizer/configure-directories.patch
new file mode 100644
index 0000000..49fddfd
--- /dev/null
+++ b/nix/pkgs/tmux-sessionizer/configure-directories.patch
@@ -0,0 +1,15 @@
+diff --git a/tmux-sessionizer b/tmux-sessionizer
+index fa1bec5..4d79e0b 100755
+--- a/tmux-sessionizer
++++ b/tmux-sessionizer
+@@ -22,9 +22,7 @@ hydrate() {
+ if [[ $# -eq 1 ]]; then
+     selected=$1
+ else
+-    # If someone wants to make this extensible, i'll accept
+-    # PR
+-    selected=$(find ~/ ~/personal ~/personal/dev/env/.config -mindepth 1 -maxdepth 1 -type d | fzf)
++    selected=$(find -L ~/ ~/Code ~/Documents -mindepth 1 -maxdepth 1 -type d | sort | fzf)
+ fi
+ 
+ if [[ -z $selected ]]; then
diff --git a/nix/pkgs/tmux-sessionizer/default.nix b/nix/pkgs/tmux-sessionizer/default.nix
new file mode 100644
index 0000000..8e15b3f
--- /dev/null
+++ b/nix/pkgs/tmux-sessionizer/default.nix
@@ -0,0 +1,27 @@
+{ pkgs, ... }:
+
+pkgs.stdenv.mkDerivation rec {
+  pname = "tmux-sessonizer";
+  version = "0.1.0";
+
+  src = pkgs.fetchFromGitHub {
+    owner = "theprimeagen";
+    repo = "tmux-sessionizer";
+    rev = "master";
+    sha256 = "bZXt9TyMU1Ed/WR0/ahMQ4oyIi6yXLKnXKYPPNBt/s4=";
+  };
+
+  buildInputs = with pkgs; [
+    bash
+    fzf
+    tmux
+  ];
+
+  patches = [ ./configure-directories.patch ];
+
+  installPhase = ''
+    mkdir -p $out/bin
+    cp tmux-sessionizer $out/bin/tmux-sessionizer
+    chmod +x $out/bin/tmux-sessionizer
+  '';
+}