diff --git a/llvm.spec b/llvm.spec
index 28e2f32..32cf4de 100644
--- a/llvm.spec
+++ b/llvm.spec
@@ -180,6 +180,7 @@ cd _build
 # force off shared libs as cmake macros turns it on.
 %cmake .. -G Ninja \
 	-DBUILD_SHARED_LIBS:BOOL=OFF \
+	-DLLVM_PARALLEL_LINK_JOBS=1 \
 	-DCMAKE_BUILD_TYPE=RelWithDebInfo \
 %ifarch s390 %{arm} %ix86
 	-DCMAKE_C_FLAGS_RELWITHDEBINFO="%{optflags} -DNDEBUG" \