LDC collisions of libs -oq option

[Smoke Adams via digitalmars-d-ldc]

When trying to compile for LDC I get package collision errors. 
This doesn't happen to DMD, and the packages are not the same.

e.g., package.d in different directories collide.

ldc says to look at the -oq option. Google can't find the -oq 
option.

Error: Output file 'Base.obj' for module 'libs.Base' collides 
with previous module 'good.Base'. See the -oq option

Works find in DMD. All the files are in different directories.