--- a/lib/util/pthread_create_blocking_np.c	2021-12-24 19:27:38.000000000 +0000
+++ b/lib/util/pthread_create_blocking_np.c	2022-04-15 16:27:13.958553234 +0000
@@ -148,7 +148,7 @@
 	 */
 	pthread_mutex_unlock(&U->mutex);
 err4:
-	pthread_cancel(*thread);
+	pthread_kill(*thread,0);
 	pthread_join(*thread, NULL);
 err3:
 	pthread_cond_destroy(&U->cond);
--- a/spipe/main.c	2021-12-24 19:27:38.000000000 +0000
+++ b/spipe/main.c	2022-04-15 16:26:28.373620198 +0000
@@ -71,7 +71,7 @@
 
 	/* Cancel the threads. */
 	for (i = 0; i < 2; i++) {
-		if ((rc = pthread_cancel(ET->threads[i])) != 0) {
+		if ((rc = pthread_kill(ET->threads[i],0)) != 0) {
 			/*
 			 * According to the POSIX standard, a Thread ID should
 			 * still be valid after pthread_exit has been invoked
@@ -80,7 +80,7 @@
 			 * this situation.
 			 */
 			if (rc != ESRCH) {
-				warn0("pthread_cancel: %s", strerror(rc));
+				warn0("pthread_kill: %s", strerror(rc));
 				goto err0;
 			}
 		}
@@ -310,13 +310,13 @@
 	exit(0);
 
 err6:
-	if ((rc = pthread_cancel(ET.threads[0])) != 0)
-		warn0("pthread_cancel: %s", strerror(rc));
+	if ((rc = pthread_kill(ET.threads[0],0)) != 0)
+		warn0("pthread_kill: %s", strerror(rc));
 	if ((rc = pthread_join(ET.threads[0], NULL)) != 0)
 		warn0("pthread_join: %s", strerror(rc));
 err5:
-	if ((rc = pthread_cancel(ET.threads[1])) != 0)
-		warn0("pthread_cancel: %s", strerror(rc));
+	if ((rc = pthread_kill(ET.threads[1],0)) != 0)
+		warn0("pthread_kill: %s", strerror(rc));
 	if ((rc = pthread_join(ET.threads[1], NULL)) != 0)
 		warn0("pthread_join: %s", strerror(rc));
 err4: