When the package has local nicknames, then nicknamed packaged are referenced as literals `("NAME" . #<package>)` in local nicknames. When bytecodes compiler compiles the file with a package having local nicknames, then during the first execution it errors, because the package can't be printed readably (it tries to dump bytecodes.data into fasc file). Example file to be compiled: ```common-lisp (defpackage "ZET" (:use) (:local-nicknames ("E" "EXT"))) ``` Present at 26.3.27, I've pushed a test to develop.