Greg,
There are AFAICT two issues here: how R unrolls the named vector that is the 'repos' element in the list 'options', and how your computer resolves DNS for localhost vs 172.17.0.1. I would try something like options(repos = c(CRAN = "http://localhost:3001/proxy", C = "http://localhost:3002", B = "http://localhost:3003/proxy", A = "http://localhost:3004")) or the equivalent with 172.17.0.1. When I do that here I get errors from first to last as we expect: > options(repos = c(CRAN = "http://localhost:3001/proxy", C = "http://localhost:3002", B = "http://localhost:3003/proxy", A = "http://localhost:3004")) > available.packages() Warning: unable to access index for repository http://localhost:3001/proxy/src/contrib: cannot open URL 'http://localhost:3001/proxy/src/contrib/PACKAGES' Warning: unable to access index for repository http://localhost:3002/src/contrib: cannot open URL 'http://localhost:3002/src/contrib/PACKAGES' Warning: unable to access index for repository http://localhost:3003/proxy/src/contrib: cannot open URL 'http://localhost:3003/proxy/src/contrib/PACKAGES' Warning: unable to access index for repository http://localhost:3004/src/contrib: cannot open URL 'http://localhost:3004/src/contrib/PACKAGES' Package Version Priority Depends Imports LinkingTo Suggests Enhances License License_is_FOSS License_restricts_use OS_type Archs MD5sum NeedsCompilation File Repository > Dirk -- dirk.eddelbuettel.com | @eddelbuettel | e...@debian.org ______________________________________________ R-package-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-package-devel