Every system and package manager will be affected if it cannot download source code to build a package.
NixOS less so, because pretty much all source downloads that are not restricted by license are a separate output that will therefore be stored on (and downloadable from) NixOS cache servers.
I'm not sure what your expectation for this is in general, nobody can just wish into existence data that is just gone.
NixOS less so, because pretty much all source downloads that are not restricted by license are a separate output that will therefore be stored on (and downloadable from) NixOS cache servers.
I'm not sure what your expectation for this is in general, nobody can just wish into existence data that is just gone.