R包安装报错,总提示连不上网

Warning: unable to access index for repository https://bioconductor.org/packages/3.8/bioc/src/contrib:
cannot open URL 'https://bioconductor.org/packages/3.8/bioc/src/contrib/PACKAGES'

解决方法:
It was a problem of download method with my freshly compiled R.
After setting up the download method to "wget" , I was able to use the install.package to download and install BioC:
options("download.file.method"="wget")