-prefix := debian/$(pkg)
-prefix-base := debian/$(pkg-base)
-prefix-mysql := debian/$(pkg-mysql)
-prefix-pg := debian/$(pkg-pg)
-prefix-pg-socket := debian/$(pkg-pg-socket)
-prefix-aodbc := debian/$(pkg-aodbc)
-
-##
-## lisp sources per pkg
-##
-srcs := sql/pool.cl sql/sql.cl sql/transactions.cl sql/utils.cl sql/functional.cl sql/usql.cl
-srcs-cmucl-compat := $(wilcard cmucl-compat/*.cl)
-srcs-base := sql/package.cl sql/db-interface.cl sql/classes.cl sql/conditions.cl
-srcs-base-uffi := $(wildcard interfaces/clsql-uffi/*.cl) $(wildcard interfaces/clsql-uffi/*.so)
-srcs-mysql := $(wildcard interfaces/mysql/*.cl) $(wildcards interfaces/mysl/*.so)
-srcs-pg := $(wildcard interfaces/postgresql/*.cl)
-srcs-pg-socket := $(wildcard interfaces/postgresql-socket/*.cl)
-srcs-aodbc := $(wildcard interfaces/aodbc/*.cl)
-
-INSTALL := install
-INSTALLFLAGS := -g root -o root -m 0644
-INSTALLDIRFLAGS := -d -g root -o root -m 0755
+
+UPSTREAM_VER := $(shell sed -n -e "s/${pkg} (\(.*\)-[0-9A-Za-z\.]).*/\1/p" < debian/changelog |head -1)
+
+## Lisp sources
+srcs := $(wildcard clsql/*.cl)
+srcs-base := $(wildcard clsql-base/*.cl)
+srcs-base-uffi := $(wildcard clsql-uffi/*.cl)
+srcs-base-uffi-so:= $(wildcard clsql-uffi/*.so)
+srcs-mysql := $(wildcard clsql-mysql/*.cl)
+srcs-mysql-so := $(wildcard clsql-mysql/*.so)
+srcs-pg := $(wildcard clsql-postgresql/*.cl)
+srcs-pg-socket := $(wildcard clsql-postgresql-socket/*.cl)
+srcs-aodbc := $(wildcard clsql-aodbc/*.cl)