diff --git a/pkgs/by-name/sh/shader-slang/1-find-packages.patch b/pkgs/by-name/sh/shader-slang/1-find-packages.patch
index 351c306521f3c..5f98b301c8b58 100644
--- a/pkgs/by-name/sh/shader-slang/1-find-packages.patch
+++ b/pkgs/by-name/sh/shader-slang/1-find-packages.patch
@@ -1,8 +1,8 @@
 diff --git a/CMakeLists.txt b/CMakeLists.txt
-index a933d0ab64..fced38bc32 100644
+index 549e465ac..546c94607 100644
 --- a/CMakeLists.txt
 +++ b/CMakeLists.txt
-@@ -160,6 +160,8 @@ advanced_option(
+@@ -175,6 +175,8 @@ advanced_option(
      "Build using system unordered dense"
      OFF
  )
@@ -11,7 +11,7 @@ index a933d0ab64..fced38bc32 100644
  
  option(
      SLANG_SPIRV_HEADERS_INCLUDE_DIR
-@@ -386,6 +388,34 @@ if(${SLANG_USE_SYSTEM_UNORDERED_DENSE})
+@@ -404,6 +406,34 @@ if(${SLANG_USE_SYSTEM_UNORDERED_DENSE})
      find_package(unordered_dense CONFIG QUIET)
  endif()
  
@@ -47,18 +47,18 @@ index a933d0ab64..fced38bc32 100644
  
  # webgpu_dawn is only available as a fetched shared library, since Dawn's nested source
 diff --git a/external/CMakeLists.txt b/external/CMakeLists.txt
-index 55d9e4941d..ff8a244651 100644
+index 801cae4d6..d45150118 100644
 --- a/external/CMakeLists.txt
 +++ b/external/CMakeLists.txt
-@@ -117,6 +117,7 @@ if(NOT ${SLANG_USE_SYSTEM_SPIRV_HEADERS})
- endif()
+@@ -133,6 +133,7 @@ if(SLANG_ENABLE_SLANG_GLSLANG)
+         )
+     endif()
  
- if(SLANG_ENABLE_SLANG_GLSLANG)
 +if(NOT ${SLANG_USE_SYSTEM_SPIRV_TOOLS})
      # SPIRV-Tools
      set(SPIRV_TOOLS_BUILD_STATIC ON)
      set(SPIRV_WERROR OFF)
-@@ -138,11 +139,14 @@ if(SLANG_ENABLE_SLANG_GLSLANG)
+@@ -148,11 +149,14 @@ if(SLANG_ENABLE_SLANG_GLSLANG)
              ${system}
          )
      endif()
@@ -73,7 +73,7 @@ index 55d9e4941d..ff8a244651 100644
      if(NOT SLANG_OVERRIDE_GLSLANG_PATH)
          add_subdirectory(glslang EXCLUDE_FROM_ALL ${system})
      else()
-@@ -154,6 +158,7 @@ if(SLANG_ENABLE_SLANG_GLSLANG)
+@@ -164,6 +168,7 @@ if(SLANG_ENABLE_SLANG_GLSLANG)
          )
      endif()
  endif()
diff --git a/pkgs/by-name/sh/shader-slang/package.nix b/pkgs/by-name/sh/shader-slang/package.nix
index 10272a197a001..59581259f22a0 100644
--- a/pkgs/by-name/sh/shader-slang/package.nix
+++ b/pkgs/by-name/sh/shader-slang/package.nix
@@ -27,13 +27,13 @@
 
 stdenv.mkDerivation (finalAttrs: {
   pname = "shader-slang";
-  version = "2025.8.1";
+  version = "2025.12.1";
 
   src = fetchFromGitHub {
     owner = "shader-slang";
     repo = "slang";
     tag = "v${finalAttrs.version}";
-    hash = "sha256-PScbMkJJ4rh8I8ID709GKtLmd5+4Z2x2BlFEdWpoesI=";
+    hash = "sha256-5M/sKoCFVGW4VcOPzL8dVhTuo+esjINPXw76fnO7OEw=";
     fetchSubmodules = true;
   };
 
@@ -131,6 +131,10 @@ stdenv.mkDerivation (finalAttrs: {
     ]
     ++ lib.optional (!withGlslang) "-DSLANG_ENABLE_SLANG_GLSLANG=OFF";
 
+  postInstall = ''
+    mv "$out/cmake" "$dev/cmake"
+  '';
+
   nativeInstallCheckInputs = [ versionCheckHook ];
   versionCheckProgram = "${placeholder "out"}/bin/slangc";
   versionCheckProgramArg = "-v";