Index: gyp
--- gyp.orig
+++ gyp
@@ -5,7 +5,7 @@
 
 set -eu
 base=$(dirname "$0")
-if type python3 >& /dev/null; then
+exec ${MODPY_BIN} "${base}/gyp_main.py" "$@"
   python=python3
 else
   python=python
