Move Nix files back to the root of the project

pkgs/tmux-sessionizer/default.nix

@@ -0,0 +1,33 @@
+{ pkgs, ... }:
+
+with pkgs;
+
+stdenv.mkDerivation {
+  pname = "tmux-sessionizer";
+  version = "0.1.0";
+
+  src = fetchFromGitHub {
+    owner = "theprimeagen";
+    repo = "tmux-sessionizer";
+    rev = "master";
+    sha256 = "bZXt9TyMU1Ed/WR0/ahMQ4oyIi6yXLKnXKYPPNBt/s4=";
+  };
+
+  buildInputs = [
+    bash
+    fzf
+    tmux
+  ];
+
+  patches = [
+    ./move-default-script.patch
+    ./add-tmux-file.patch
+    ./configure-directories.patch
+  ];
+
+  installPhase = ''
+    mkdir -p $out/bin
+    cp tmux-sessionizer $out/bin/tmux-sessionizer
+    chmod +x $out/bin/tmux-sessionizer
+  '';
+}