Update src/common.bzl

Co-authored-by: Kristóf Umann <dkszelethus@gmail.com>

Author: furtib

src/common.bzl

@@ -60,11 +60,12 @@ def python_path(ctx):
         python_path = py_runtime_info.interpreter
     elif hasattr(py_toolchain, "py3_runtime"):
         py_runtime = py_toolchain.py3_runtime
-        python_path = py_runtime.interpreter_path
-
-        # @rules_python does not provide interpreter_path, but interpreter.path
-        if python_path == None:
+        if hasattr(interpreter_path, python_path):
+            python_path = py_runtime.interpreter_path
+        elif hasattr(interpreter.path, python_path):
             python_path = py_runtime.interpreter.path
+        else:
+            fail("Failed to retrieve python path!")
     else:
         fail("The resolved Python toolchain does not provide a Python3 runtime.")
     if not python_path: