diff --git a/utils/build-script-impl b/utils/build-script-impl
index ec6e334583292..070797cff9c4f 100755
--- a/utils/build-script-impl
+++ b/utils/build-script-impl
@@ -2779,6 +2779,7 @@ for host in "${ALL_HOSTS[@]}"; do
                     -DCMAKE_C_COMPILER:PATH="${LLVM_BIN}/clang"
                     -DCMAKE_CXX_COMPILER:PATH="${LLVM_BIN}/clang++"
                     -DCMAKE_SWIFT_COMPILER:PATH="${SWIFTC_BIN}"
+                    -DCMAKE_Swift_COMPILER:PATH="${SWIFTC_BIN}"
                     -DCMAKE_INSTALL_PREFIX:PATH="$(get_host_install_prefix ${host})"
                     -DCMAKE_INSTALL_LIBDIR:PATH="lib"