Hi i have some basic question: Let's say, i have defined a system where with four files: system.asd, packages.lisp, file1.lisp, file2.lisp, where file1 and file2 share the same package and are split more or less only for better organisation purpose. So in packages.lisp i define only one package and use the respective in-package expression for it in the beginning of the two files. Besides that file1 should be loaded before file2. In my asd file i have something like this: (defsystem "system" :depends-on ("ext-system") :serial t :components ((:file "packages") (:file "file1") (:file "file2"))) Trying to load this system with (ql:quickload "system") i get an error, that there is no package for file1. i discovered that when i define a package for file1, although never use it, things work as i want. Does one have to define a package for each file listed in :components? Is there some other, more suitable way to fulfil my purpose (use the same package in both files? Thanks for any help Matus