Nest env binaries
  $ dune build
  Executing priv as priv
  PATH:
  	$TESTCASE_ROOT/_build/default/using-priv/nested/.bin
  	$TESTCASE_ROOT/_build/default/using-priv/.bin
  	$TESTCASE_ROOT/_build/install/default/bin
  Executing priv as priv-renamed
  PATH:
  	$TESTCASE_ROOT/_build/default/using-priv/nested/.bin
  	$TESTCASE_ROOT/_build/default/using-priv/.bin
  	$TESTCASE_ROOT/_build/install/default/bin
  Executing priv as priv-renamed-nested
  PATH:
  	$TESTCASE_ROOT/_build/default/using-priv/nested/.bin
  	$TESTCASE_ROOT/_build/default/using-priv/.bin
  	$TESTCASE_ROOT/_build/install/default/bin
