add back in comment line that was accidentally dropped in merge.

1 files changed, 1 insertions, 0 deletions

diff --git a/py/mock.py b/py/mock.py
index 9389d2e..0d0c312 100755
--- a/py/mock.py
+++ b/py/mock.py
@@ -30,6 +30,7 @@ import sys
 import time
 from optparse import OptionParser
 
+# all of the variables below are substituted by the build system
 __VERSION__="unreleased_version"
 SYSCONFDIR=os.path.join(os.path.dirname(os.path.realpath(sys.argv[0])),"..","etc")
 PYTHONDIR=os.path.dirname(os.path.realpath(sys.argv[0]))