improve error message when old version detected
Be more explicit about the --wipe command requiring to be executed from the source dir.
@@ -2477,7 +2477,8 @@ def load(build_dir: str) -> Build:
raise MesonException(
"Build data file {!r} references functions or classes that don't "
"exist. This probably means that it was generated with an old "
- "version of meson. Try running meson {} --wipe".format(filename, build_dir))
+ "version of meson. Try running from the source directory "
+ "meson {} --wipe".format(filename, build_dir))
if not isinstance(obj, Build):
raise MesonException(load_fail_msg)
return obj
