>>> Downloading 'https://dev.gentoo.org/~jlec/distfiles/libcmatrix-3.11.0.tar.gz'
--2021-05-13 21:53:00--  https://dev.gentoo.org/~jlec/distfiles/libcmatrix-3.11.0.tar.gz
Resolving dev.gentoo.org... 2001:470:ea4a:1:5054:ff:fec7:86e4, 140.211.166.183
Connecting to dev.gentoo.org|2001:470:ea4a:1:5054:ff:fec7:86e4|:443... connected.
HTTP request sent, awaiting response... 404 Not Found
2021-05-13 21:53:01 ERROR 404: Not Found.

 * Fetch failed for 'sci-libs/libcmatrix-3.11.0-r1', Log file:
 *  '/var/log/portage/sci-libs:libcmatrix-3.11.0-r1:20210513-195300.log'
!!! Couldn't download 'libcmatrix-3.11.0.tar.gz'. Aborting.