if you want to install any slf4j-*-1.5.11 or other ebuilds portage fails to get the files. Reproducible: Always
Created attachment 225095 [details] build log of slf4j-api-1.5.11 I can confirm that bug.
In the ebuild it says HOMEPAGE="http://www.slf4j.org/" # Get from http://www.slf4j.org/dist/${P/-nop/}.tar.gz SRC_URI="mirror://gentoo/${P}-sources.jar" Ebuild should prompt for user intervention in download process.
Forgot to upload. Sorry about that. They will be there at least within a day. It all depends on how fast your mirror gets them.