diff --git a/lib/flatware/cli.rb b/lib/flatware/cli.rb
index 4dad80e..6ea47d1 100644
--- a/lib/flatware/cli.rb
+++ b/lib/flatware/cli.rb
@@ -55,7 +55,8 @@ def clear
 
     def start_sink(jobs:, workers:, formatter:)
       $0 = 'flatware sink'
-      Process.setpgrp
+      try_setpgrp
+
       passed = Sink.start_server(
         jobs: jobs,
         formatter: Flatware::Broadcaster.new([formatter]),
@@ -65,6 +66,12 @@ def start_sink(jobs:, workers:, formatter:)
       exit passed ? 0 : 1
     end
 
+    def try_setpgrp
+      Process.setpgrp
+    rescue Errno::EPERM => e
+      Flatware.log 'continuing after: Process.setpgrp:', e.message
+    end
+
     def workers
       options[:workers]
     end