diff --git a/nc_optimisation.cmake b/nc_optimisation.cmake
index 704dce9..a8dd1c4 100644
--- a/nc_optimisation.cmake
+++ b/nc_optimisation.cmake
@@ -32,6 +32,7 @@ if (LTO)
     # situations where we may accidentally use regular/fat objects.
     append_compile_flag("-flto")
     append_compile_flag("-fno-fat-lto-objects")
+    append_compile_flag("-flto-jobs=0")
 
     # Try to squeeze out some more diagnostics via LTO
     append_compile_flag("-flto-odr-type-merging")