Package: urweb Version: 20170105+dfsg-1 The urweb package is missing a runtime dependency on gcc. after an apt-get install urweb (using the sid-slim docker image)
unless you manually apt-get install gcc invoking: $ urweb project sh: gcc: command not found $ This is somewhat complicated by the fact that urweb picks the default -ccompiler from the CC environment variable at compile-time. And i'm not sure if any fancy kind of dependency can reflect that behavior. The workaround of installing gcc manually is fairly simple though.
