Index: third_party/ipcz/src/BUILD.gn
--- third_party/ipcz/src/BUILD.gn.orig
+++ third_party/ipcz/src/BUILD.gn
@@ -7,7 +7,7 @@ import("//build_overrides/ipcz.gni")
 import("//testing/libfuzzer/fuzzer_test.gni")
 import("//testing/test.gni")
 
-enable_multiprocess_tests = is_linux
+enable_multiprocess_tests = is_linux && !is_bsd
 
 buildflag_header("test_buildflags") {
   header = "test_buildflags.h"
