diff --git a/package/compiler-rt/compiler-rt.mk b/package/compiler-rt/compiler-rt.mk
index c8ea86e899..fbf4707bfc 100644
--- a/package/compiler-rt/compiler-rt.mk
+++ b/package/compiler-rt/compiler-rt.mk
@@ -12,6 +12,7 @@ COMPILER_RT_SITE = https://github.com/llvm/llvm-project/releases/download/llvmor
 COMPILER_RT_LICENSE = NCSA MIT
 COMPILER_RT_LICENSE_FILES = LICENSE.TXT
 COMPILER_RT_DEPENDENCIES = host-clang llvm
+COMPILER_RT_SUPPORTS_IN_SOURCE_BUILD = NO
 
 COMPILER_RT_INSTALL_STAGING = YES
 COMPILER_RT_INSTALL_TARGET = NO