This is because the download URL points to the latest-version tarball; this is
currently
1.15. 1.14 does not appear to be available there in any event.
>>> Downloading http://www.ladspa.org/download/cmt_src.tgz
--17:46:43-- http://www.ladspa.org/download/cmt_src.tgz
=> `/usr/portage/distfiles/cmt_src.tgz'
Resolving www.ladspa.org... done.
Connecting to www.ladspa.org[194.217.16.44]:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 61,522 [text/plain]
100%[====================================>] 61,522 43.95K/s
ETA 00:00
17:46:45 (43.95 KB/s) - `/usr/portage/distfiles/cmt_src.tgz' saved
[61522/61522]
!!! cmt_src.tgz: message digests do not match!
!!! cmt_src.tgz is corrupt or incomplete.
>>> our recorded digest: 78750d9b243386d94ba1695b9c0ba885
>>> your file's digest: aa2f0609aca8b698625d86170c426e2c
>>> Please delete /usr/portage/distfiles/cmt_src.tgz and refetch.
