(defpattern Name ...) uses Name to register the pattern handler before the package macro has prefixed all symbols

[tizoc]

Since registering of the handler happens during macro expansion, which itself happens before the package form is handled, the reference to the pattern handler is added using the unprefixed name.

There is no way to recover the name of the current package at the moment, so the solution for now is to just make users aware of this.

library is likely to use it's own loader in the future and discourage the use of package in favor of other namespacing mechanism. In that case package wouldn't be a problem.