diff --git a/qgis_bootstrap.py b/qgis_bootstrap.py
index 9c606f3..5738c15 100644
--- a/qgis_bootstrap.py
+++ b/qgis_bootstrap.py
@@ -44,32 +44,35 @@
 import os
 import sys
 
-# ==== Linux QGIS installation prefix ====
-QGIS_PREFIX = "/usr/bin/qgis"
+# QGIS environment
+os.environ["QGIS_PREFIX_PATH"] = "/usr"
+os.environ["QGIS_HOME"] = "/usr"
 
-os.environ["QGIS_PREFIX_PATH"] = QGIS_PREFIX
 os.environ["PROJ_LIB"] = "/usr/share/proj"
 os.environ["GDAL_DATA"] = "/usr/share/gdal"
-os.environ["QT_PLUGIN_PATH"] = "/usr/lib/qt/plugins"
+os.environ["QT_PLUGIN_PATH"] = "/usr/lib/x86_64-linux-gnu/qt5/plugins"
 
-# Python path
+# Python modules (from system)
 sys.path.append("/usr/lib/python3/dist-packages")
 sys.path.append("/usr/lib/python3/dist-packages/qgis")
 sys.path.append("/usr/lib/python3/dist-packages/qgis/plugins")
 
+# QGIS Python plugins (THIS IS THE MISSING PART)
+sys.path.append("/usr/share/qgis/python")
+sys.path.append("/usr/share/qgis/python/plugins")
+
+# Optional for safety
+sys.path.append("/usr/lib/qgis")
+sys.path.append("/usr/lib/qgis/plugins")
 
 from qgis.core import QgsApplication
 from qgis.analysis import QgsNativeAlgorithms
-
 import processing
 from processing.core.Processing import Processing
 
-
 def start_qgis():
     qgs = QgsApplication([], False)
     qgs.initQgis()
-
     Processing.initialize()
     qgs.processingRegistry().addProvider(QgsNativeAlgorithms())
-
     return qgs