diff --git a/libcxx.spec b/libcxx.spec
index 968e816..d0800de 100644
--- a/libcxx.spec
+++ b/libcxx.spec
@@ -1,8 +1,6 @@
 # If you need to bootstrap this, turn this on.
 # Otherwise, you have a loop with libcxxabi
-%ifnarch riscv64
 %global toolchain clang
-%endif
 %global bootstrap 0
 
 %global libcxx_version 15.0.4
@@ -71,6 +69,10 @@ Summary:	Static libraries for libcxx
 
 %build
 
+%ifarch riscv64
+%define _lto_cflags %{nil}
+%endif
+
 # The location of this header changed.
 if [[ -f %{_includedir}/cxxabi.h ]]; then
     LIBCXX_ABI_PATH=%{_includedir}
@@ -163,7 +165,7 @@ install -m 0644 src/include/*.h %{buildroot}%{_includedir}/libcxx-internal/
 
 %changelog
 * Sun Nov 27 2022 David Abdurachmanov <davidlt@rivosinc.com> - 15.0.4-1.0.riscv664
-- Build for riscv64
+- Build for riscv64 (disable LTO)
 
 * Tue Nov 08 2022 Nikita Popov <npopov@redhat.com> - 15.0.4-1
 - Update to LLVM 15.0.4