digraph deps {

    subgraph depsgr {
        libdwarf [color=slategray];
        libcxxfileno [label="libc++fileno", color=slategray];
        libsrk31cxx [label="libsrk31c++", color=slategray];
        libdwarfpp [color=slategray];

        dwarfassembly [label="dwarf-assembly", color=limegreen];
        libunwind [label="libunwind-eh_elf", color=limegreen];
        perf [label="perf-eh_elf", color=limegreen];

        dwarfinterpret [color=blue];
        framemachine [label="frame-machine", color=blue];
        libdwarfpptests [label="libdwarfpp-tests", color=blue];


        libdwarf -> libdwarfpp;
        libcxxfileno -> libsrk31cxx;
        libcxxfileno -> libdwarfpp;
        libsrk31cxx -> libdwarfpp;

        libdwarfpp -> dwarfassembly;

        libunwind -> perf;

        libdwarfpp -> dwarfinterpret;
        libdwarfpp -> framemachine;
        libdwarfpp -> libdwarfpptests;
    }

    subgraph cluster_key {
        label="Key";

        extdep [label="External dependency", color=slategray];
        main   [label="Main project", color=limegreen];
        side   [label="Side project", color=blue];
    }

    framemachine -> main [style=invis];
}