diff --git a/.github/workflows/install-build-tools.sh b/.github/workflows/install-build-tools.sh
index d8e1ed2..f67804e 100644
--- a/.github/workflows/install-build-tools.sh
+++ b/.github/workflows/install-build-tools.sh
@@ -156,12 +156,12 @@ fi
 case "${OSTYPE-}" in
 linux*)
   if [ -n "$use_clang" ]; then
-    # ubuntu_codename=$(lsb_release --codename --short)
-    # llvm_version=18
-    # sudo apt-key add mk/llvm-snapshot.gpg.key
-    # sudo add-apt-repository "deb http://apt.llvm.org/$ubuntu_codename/ llvm-toolchain-$ubuntu_codename-$llvm_version main"
-    # sudo apt-get update
-    # install_packages clang-$llvm_version llvm-$llvm_version
+    ubuntu_codename=$(lsb_release --codename --short)
+    llvm_version=18
+    sudo apt-key add mk/llvm-snapshot.gpg.key
+    sudo add-apt-repository "deb http://apt.llvm.org/$ubuntu_codename/ llvm-toolchain-$ubuntu_codename-$llvm_version main"
+    sudo apt-get update
+    install_packages clang-$llvm_version llvm-$llvm_version
   fi
   ;;
 esac