* installing *source* package ‘this.path’ ...
** using staged installation
Error in .make_numeric_version(x, strict, .standard_regexps()$valid_R_system_version,  : 
  invalid non-character version specification 'x' (type: list)
Calls: main ... make_backports -> R_system_version -> .make_numeric_version
Execution halted
ERROR: configuration failed for package ‘this.path’
* removing ‘/srv/hornik/tmp/CRAN/this.path.Rcheck/this.path’