mercury.list
deb http://dl.mercurylang.org/deb/ bullseye main
deb-src http://dl.mercurylang.org/deb/ bullseye main
... everything is OK with "All packages are up to date"
Then "Skipping acquire of configured file 'main/binary=arm64/packages as repository ... does not support architecture 'arm64'
mercury.list
deb http://dl.mercurylang.org/deb/ bullseye main
deb-src http://dl.mercurylang.org/deb/ bullseye main
... everything is OK with "All packages are up to date"
Then "Skipping acquire of configured file 'main/binary=arm64/packages as repository ... does not support architecture 'arm64'