diff --git a/platformio/proc.py b/platformio/proc.py
index 707245a1..cae17a29 100644
--- a/platformio/proc.py
+++ b/platformio/proc.py
@@ -165,7 +165,7 @@ def is_container():
 
 
 def get_pythonexe_path():
-    return os.environ.get("PYTHONEXEPATH", os.path.normpath(sys.executable))
+    return "@interpreter@"
 
 
 def copy_pythonpath_to_osenv():
@@ -181,7 +181,7 @@ def copy_pythonpath_to_osenv():
             )
         if all(conditions):
             _PYTHONPATH.append(p)
-    os.environ["PYTHONPATH"] = os.pathsep.join(_PYTHONPATH)
+    os.environ["PYTHONPATH"] = os.pathsep.join(sys.path)
 
 
 def where_is_program(program, envpath=None):