rdmd + ldmd2 = ?

[Dicebot]

$ cat test.d
void main()
{
     import std.stdio;
     writeln("hello");
}
$ rdmd --compiler=ldmd2 test.d
Error: cannot write object file: Error opening output file 
'/tmp/.rdmd-1000/rdmd-test.d-076D4362D54E9EAA8F49CE8F8A45511D/objs/test.o'
$ ls /tmp/.rdmd-1000/rdmd-test.d-076D4362D54E9EAA8F49CE8F8A45511D/
rdmd.deps

Is it an issue of ldmd2 object file output or tweak required from 
rdmd side?

(rdmd build from 2.063.2 tag, ldc 0.11.0)