diff -up swatchdog-3.2.4/lib/Swatchdog/Actions.pm.fixed swatchdog-3.2.4/lib/Swatchdog/Actions.pm
--- swatchdog-3.2.4/lib/Swatchdog/Actions.pm.fixed	2022-09-23 14:50:19.598213866 -0400
+++ swatchdog-3.2.4/lib/Swatchdog/Actions.pm	2022-09-23 14:50:36.639300066 -0400
@@ -96,7 +96,7 @@ sub exec_command {
 
  EXECFORK: {
     if ($exec_pid = fork) {
-      waitpid(-1, WNOHANG);
+      waitpid($exec_pid, 0);
       return 0;
     } elsif (defined $exec_pid) {
       exec($command);