diff --git a/pkgs/by-name/kc/kcl-language-server/package.nix b/pkgs/by-name/kc/kcl-language-server/package.nix
index 36586717f0ff..213b14e0b27d 100644
--- a/pkgs/by-name/kc/kcl-language-server/package.nix
+++ b/pkgs/by-name/kc/kcl-language-server/package.nix
@@ -9,18 +9,18 @@
 
 rustPlatform.buildRustPackage rec {
   pname = "kcl-language-server";
-  version = "0.11.2";
+  version = "0.11.2-unstable-2025-10-26";
 
   src = fetchFromGitHub {
     owner = "kcl-lang";
     repo = "kcl";
-    rev = "v${version}";
-    hash = "sha256-6XDLxTpgENhP7F51kicAJB7BNMtX4cONKJApAhqgdno=";
+    rev = "68b4062e1f6b818b2fc64cfc69ef0a692b35943d";
+    hash = "sha256-5yX9TYmn0nGlSI8jiAwxuYpBXq9ie+yVDHwcC1FLcBk=";
   };
 
   sourceRoot = "${src.name}/kclvm";
 
-  cargoHash = "sha256-eJ3Gh2l6T2DxJRQRHamPOr/ILtzsqFB497DdXVJ90RE=";
+  cargoHash = "sha256-FulW9qNVVZtOoRfm+NPwQENJU9Ib1GBzcjHxk5QS70g=";
 
   PROTOC = "${protobuf}/bin/protoc";
   PROTOC_INCLUDE = "${protobuf}/include";