1 files changed, 1 insertions, 0 deletions
diff --git a/distbuild-helper b/distbuild-helper
index 76a39d5f..1f648dd4 100755
--- a/distbuild-helper
+++ b/distbuild-helper
@@ -131,6 +131,7 @@ class HelperMachine(distbuild.StateMachine):
             'JsonMachine: exec request: stdin=%s', repr(stdin_contents))
 
         p = subprocess.Popen(argv,
+                             preexec_fn=os.setpgrp,
                              stdin=subprocess.PIPE,
                              stdout=subprocess.PIPE,
                              stderr=subprocess.PIPE)