> install.packages("brms")
Installing package into ‘/home/robka/R’
(as ‘lib’ is unspecified)
--- Please select a CRAN mirror for use in this session ---
also installing the dependencies ‘rstan’, ‘shinystan’

trying URL '[stat.ethz.ch];
Content type 'application/x-gzip' length 838052 bytes (818 KB)
==================================================
downloaded 818 KB

trying URL '[stat.ethz.ch];
Content type 'application/x-gzip' length 2400413 bytes (2.3 MB)
==================================================
downloaded 2.3 MB

trying URL '[stat.ethz.ch];
Content type 'application/x-gzip' length 3818402 bytes (3.6 MB)
==================================================
downloaded 3.6 MB

* installing *source* package ‘rstan’ ...
** package ‘rstan’ successfully unpacked and MD5 sums checked
** libs
Error in .shlib_internal(args) : 
  C++14 standard requested but CXX14 is not defined
* removing ‘/home/robka/R/rstan’
ERROR: dependency ‘rstan’ is not available for package ‘shinystan’
* removing ‘/home/robka/R/shinystan’
ERROR: dependencies ‘rstan’, ‘shinystan’ are not available for package ‘brms’
* removing ‘/home/robka/R/brms’

The downloaded source packages are in
	‘/tmp/RtmprXXqoJ/downloaded_packages’
Warning messages:
1: In install.packages("brms") :
  installation of package ‘rstan’ had non-zero exit status
2: In install.packages("brms") :
  installation of package ‘shinystan’ had non-zero exit status
3: In install.packages("brms") :
  installation of package ‘brms’ had non-zero exit status
>