Interesting, thanks for sharing. I would be tempted to call this a bug in the Makefile if this is the case. CDPATH is a standard bash environment variable, peop

Interesting, thanks for sharing. I would be tempted to call this a bug in the Makefile if this is the case. CDPATH is a standard bash environment variable, people use it in various ways: https://github.com/search?q=%22export+CDPATH%22&type=code https://github.com/search?q=%22export+CDPATH%22&type=code If all these causes the build to fail then the maintainers of that build should be informed.