-SOURCEDIR := $(prefix)/usr/share/common-lisp/source/${pkg}
-DOCDIR := $(prefix)/usr/share/doc/${debpkg}
+UPSTREAM_VER := $(shell sed -n -e "s/${debpkg} (\(.*\)-[0-9.]).*/\1/p" < debian/changelog |head -1)
+
+pkg-ver := $(debpkg)-$(UPSTREAM_VER)
+clc-source := usr/share/common-lisp/source
+clc-systems := usr/share/common-lisp/systems
+clc-uffi := $(clc-source)/$(pkg)-$(UPSTREAM_VER)
+
+pkg-doc := usr/share/doc/${debpkg}
+lispfiles := $(prefix)/$(clc-uffi)
+docfiles := $(prefix)/$(pkg-doc)