--- config/nim.cfg.orig
+++ config/nim.cfg
@@ -78,12 +78,6 @@
     clang.options.linker = "-ldl"
     tcc.options.linker = "-ldl"
   @end
-  @if bsd or haiku:
-    # BSD got posix_spawn only recently, so we deactivate it for osproc:
-    define:useFork
-    # at least NetBSD has problems with thread local storage:
-    tlsEmulation:on
-  @end
 @end
 
 # Configuration for the Intel C/C++ compiler: