>>> Unpacking source...
>>> Unpacking mysqlcc-0.9.4-src.tar.gz to /var/tmp/portage/mysql/mysqlcc-0.9.4/work

 * Cannot find $EPATCH_SOURCE!  Value for $EPATCH_SOURCE is:
 *
 *   /usr/local/portage/mysql/mysqlcc/files/mysqlcc-0.9.4-libmysqlclientac.patch
 *   ( mysqlcc-0.9.4-libmysqlclientac.patch )


!!! ERROR: mysql/mysqlcc-0.9.4 failed.
Call stack:
  ebuild.sh, line 1568:   Called dyn_unpack
  ebuild.sh, line 708:   Called src_unpack
  mysqlcc-0.9.4.ebuild, line 25:   Called epatch '/usr/local/portage/mysql/mysqlcc/files/mysqlcc-0.9.4-libmysqlclientac.patch'
  eutils.eclass, line 198:   Called die

!!! Cannot find $EPATCH_SOURCE!
!!! If you need support, post the topmost build error, and the call stack if relevant.

!!! This ebuild is from an overlay: '/usr/local/portage'