Merging Report issues with Path.

[nitsugahcram]

I am merging coverage.json report using report option, all go ok, however, the path are not equal length.
One is fully path and the other is partial,
one is
coverage.json --> "/home/ah/i/i-ui/public-interface/engine/api/xxxx
covertage.json --> ./dashboard/public/js/xxxx ,

Both are under public-interface one of the report is got from karma and the other with mocha. Is it possible to normalize the path?