tools/examples: hardcode #!/usr/bin/python shebang
diff --git a/tools/inject.py b/tools/inject.py
index 2cf9909..fa2d388 100755
--- a/tools/inject.py
+++ b/tools/inject.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/python
 #
 # This script generates a BPF program with structure inspired by trace.py. The
 # generated program operates on PID-indexed stacks. Generally speaking,