sed: can't read setup.cfg: No such file or directory

* ERROR: dev-python/wheel-0.40.0::python-modules-kit failed (prepare phase):

 *   (no error message)

 *  
 * Call stack:

 *     ebuild.sh, line  93:  Called src_prepare

 *   environment, line 3582:  Called die

 * The specific snippet of code:

 *       sed -e 's:--cov=wheel::g' -i setup.cfg || die;