diff --git a/pkgs/tools/misc/tmux/default.nix b/pkgs/tools/misc/tmux/default.nix
index 192c5eb0823b..d102d27a6c4c 100644
--- a/pkgs/tools/misc/tmux/default.nix
+++ b/pkgs/tools/misc/tmux/default.nix
@@ -12,22 +12,18 @@ let
 in
 
 stdenv.mkDerivation rec {
-  name = "tmux-${version}";
-  version = "2.8";
+  pname = "tmux";
+  version = "2.9";
 
   outputs = [ "out" "man" ];
 
   src = fetchFromGitHub {
-    owner = "tmux";
-    repo = "tmux";
-    rev = "01918cb0170e07288d3aec624516e6470bf5b7fc";
-    sha256 = "1fy87wvxn7r7jzqapvjisc1iizic3kxqk2lv83giqmw1y4g3s7rl";
+    owner = pname;
+    repo = pname;
+    rev = version;
+    sha256 = "191y986k9q17fdxlh3ldkr81s8fpxj4n2lc2lys6hzi4ybrhgdik";
   };
 
-  postPatch = ''
-    sed -i 's/2.8-rc/2.8/' configure.ac
-  '';
-
   nativeBuildInputs = [ pkgconfig autoreconfHook ];
 
   buildInputs = [ ncurses libevent makeWrapper ];