The python-any-r1 eclass is meant to be used for packages that have build-time dependency on Python. The generated || dependency (and lack of explanatory USE flags) is not appropriate for packages that require Python at runtime. Please fix the package to use python-single-r1. While at it, please remember to include PYTHON_REQUIRED_USE in REQUIRED_USE.
Should be fixed by https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=7e191f763117bb92f28e18b1d23bb940240db2cc