/usr/share/common-lisp/ is in cl-uffi 2.1.2-1.
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/usr/share/common-lisp/source/
/usr/share/common-lisp/source/uffi/
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/usr/share/common-lisp/source/uffi/src/aggregates.lisp
/usr/share/common-lisp/source/uffi/src/functions.lisp
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/usr/share/common-lisp/source/uffi/src/primitives.lisp
/usr/share/common-lisp/source/uffi/src/readmacros-mcl.lisp
/usr/share/common-lisp/source/uffi/src/strings.lisp
/usr/share/common-lisp/source/uffi/uffi.asd
/usr/share/common-lisp/systems/