Installs panddas into its own prefix (--prefix + --ignore-installed) so the shared ccp4/9.0 module is never modified; PYTHONPATH prepend shadows the ccp4-bundled copy. ccp4/9.0 is build- and runtime dependency. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_0152MuuYUaapP7CtxrDAfvBh