This package solves the problem of turning off inlining when compiling a Common Lisp system. To use it, wrap the macro DISABLE-INLINE:WITH-NO-INLINE around the compilation: (disable-inline:with-no-inline (ql:quickload <system>)) Inside the dynamic environment created by this macro, any DEFPACKAGE form is modified (via a macroexpand hook) to shadow INLINE with a symbol that is a meaningless but valid declaration. The main purpose of this is to compile public Common Lisp systems so the coverage of their test suites can be measured using sbcl's sb-cover package. This will still not handle coverage of defmacros; for that systems should move their macros to separate files from the ones they are used in. Even that will not handle coverage of the code expanded from uses of these macros; for that, Waters' COVER package is recommended.