diff --git a/llvm/utils/release/test-release.sh b/llvm/utils/release/test-release.sh
index 0c214261c2723..0818cb8613dd1 100755
--- a/llvm/utils/release/test-release.sh
+++ b/llvm/utils/release/test-release.sh
@@ -404,12 +404,17 @@ function configure_llvmCore() {
             ;;
     esac
 
-    project_list=${projects// /;}
-    # Leading spaces will result in ";<runtime name>". This causes a CMake
-    # error because the empty string before the first ';' is treated as an
-    # unknown runtime name.
-    runtimes=$(echo $runtimes | sed -e 's/^\s*//')
-    runtime_list=${runtimes// /;}
+    if [ "$Phase" -eq "3" ]; then
+      project_list=${projects// /;}
+      # Leading spaces will result in ";<runtime name>". This causes a CMake
+      # error because the empty string before the first ';' is treated as an
+      # unknown runtime name.
+      runtimes=$(echo $runtimes | sed -e 's/^\s*//')
+      runtime_list=${runtimes// /;}
+    else
+      project_list="clang"
+      runtime_list=""
+    fi
     echo "# Using C compiler: $c_compiler"
     echo "# Using C++ compiler: $cxx_compiler"