diff --git a/pkgs/by-name/tm/tmux/package.nix b/pkgs/by-name/tm/tmux/package.nix
index 4f6668b1b659..35a49b04d009 100644
--- a/pkgs/by-name/tm/tmux/package.nix
+++ b/pkgs/by-name/tm/tmux/package.nix
@@ -20,7 +20,7 @@
 
 stdenv.mkDerivation (finalAttrs: {
   pname = "tmux";
-  version = "3.6";
+  version = "3.6a";
 
   outputs = [
     "out"
@@ -31,7 +31,7 @@ stdenv.mkDerivation (finalAttrs: {
     owner = "tmux";
     repo = "tmux";
     rev = finalAttrs.version;
-    hash = "sha256-jIHnwidzqt+uDDFz8UVHihTgHJybbVg3pQvzlMzOXPE=";
+    hash = "sha256-VwOyR9YYhA/uyVRJbspNrKkJWJGYFFktwPnnwnIJ97s=";
   };
 
   nativeBuildInputs = [