tools/examples: hardcode #!/usr/bin/python shebang
diff --git a/tools/dbslower.py b/tools/dbslower.py
index a42df87..24e6394 100755
--- a/tools/dbslower.py
+++ b/tools/dbslower.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/python
 #
 # dbslower      Trace MySQL and PostgreSQL queries slower than a threshold.
 #