diff --git a/pkgs/llvm-ompss2/clang.nix b/pkgs/llvm-ompss2/clang.nix
index d1c16ae..c8613c3 100644
--- a/pkgs/llvm-ompss2/clang.nix
+++ b/pkgs/llvm-ompss2/clang.nix
@@ -17,6 +17,7 @@
 , gitUrl ? "ssh://git@bscpm04.bsc.es/llvm-ompss/llvm-mono.git"
 , gitBranch ? "master"
 , gitCommit ? "872ba63f86edaefc9787984ef3fae9f2f94e0124" # github-release-2025.11
+, buildLlvmPackages
 }:
 
 let
@@ -119,6 +120,8 @@ in stdenv.mkDerivation {
       "-DCMAKE_INSTALL_RPATH=${zlib}/lib:${gcc.cc.lib}/lib"
       "-DLLVM_APPEND_VC_REV=ON"
       "-DLLVM_FORCE_VC_REVISION=${source.version}"
+      "-DLLVM_TABLEGEN_EXE=${buildLlvmPackages.tblgen}/bin/llvm-tblgen"
+      "-DCLANG_TABLEGEN=${buildLlvmPackages.tblgen}/bin/clang-tblgen"
     )
   '';