Plain-odbc is lisp wrapper around the ODBC library. It works on UNIX on Windows. Ir depends on the CFFI system. CFFI itself depends on the systems babel alexandria trivial-features, These systems are included in the directory libs. The file "plain-odbc-with-libs.asd" contains the code that will load the system definitions for the included libraries and define the system plain-odbc-with-libs which huts depends on the system plain-odbc. (asdf:oos 'asdf:load-op :plain-odbc-with-libs) will load plain-odbc and the included libraries. If you have your own version of these libraries you can still use the system file "plain-odbc.asd"