diff --git a/flake.nix b/flake.nix
index d84cd41..7187c2f 100644
--- a/flake.nix
+++ b/flake.nix
@@ -16,6 +16,22 @@
         pkgs = import nixpkgs {
           inherit system;
         };
+        tmux-setup = pkgs.writeShellScriptBin "tmux-setup" ''
+          #!/usr/bin/env sh
+          SESSION="transcendance"
+          DIR=$(git rev-parse --show-toplevel 2>/dev/null || pwd)
+          if ! tmux has-session -t $SESSION 2>/dev/null; then
+            tmux new-session -d -s $SESSION -c "$DIR" -n dev
+            tmux send-keys -t $SESSION:0 'vim' C-m
+            tmux split-window -h -p 30 -t $SESSION:0 -c "$DIR"
+            tmux send-keys -t $SESSION:0.1 'exec zsh' C-m
+            tmux new-window -t $SESSION:1 -n git -c "$DIR"
+            tmux send-keys -t $SESSION:1 'lazygit' C-m
+          fi
+          tmux select-window -t $SESSION:0
+          tmux select-pane -t $SESSION:0.0
+          tmux attach -t $SESSION
+        '';
       in
       {
         devShells.default = pkgs.mkShell {
@@ -23,6 +39,7 @@
           buildInputs =
             with pkgs;
             [
+              tmux-setup
               nasm
               gcc
               binutils