-SOURCESDEST := $(prefix)/usr/share/common-lisp/repositories/uffi/src
-SYSDIR := $(prefix)/usr/share/common-lisp/systems
-DOCDIR := $(prefix)/usr/share/doc/uffi
+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)
+
+srcdir := $(prefix)/$(clc-uffi)
+DOCDIR := $(prefix)/usr/share/doc/${debpkg}