diff -ru a/src/main/native/unix_jni_darwin.cc b/src/main/native/unix_jni_darwin.cc
--- a/src/main/native/unix_jni_darwin.cc	1980-01-01 00:00:00.000000000 -0500
+++ b/src/main/native/unix_jni_darwin.cc	2021-11-27 20:35:29.000000000 -0500
@@ -270,6 +270,7 @@
 }
 
 int portable_suspend_count() {
+  if (getenv("NIX_BUILD_TOP")) return 0;
   static dispatch_once_t once_token;
   static SuspendState suspend_state;
   dispatch_once(&once_token, ^{