python3 pip install fails:

[Gerardwx]

python3 -m pip install pygamma
/usr/lib/python3/dist-packages/secretstorage/dhcrypto.py:15: CryptographyDeprecationWarning: int_from_bytes is deprecated, use int.from_bytes instead
from cryptography.utils import int_from_bytes
/usr/lib/python3/dist-packages/secretstorage/util.py:19: CryptographyDeprecationWarning: int_from_bytes is deprecated, use int.from_bytes instead
from cryptography.utils import int_from_bytes
Defaulting to user installation because normal site-packages is not writeable
Looking in indexes: https://pypi.org/simple, https://nmrbox-python:****@apt.nmrbox.org:/pip
ERROR: Could not find a version that satisfies the requirement pygamma (from versions: none)
ERROR: No matching distribution found for pygamma