Error with sample code

[volfi]

I cannot run the code which you provide:

image: rocker/r-ubuntu:18.04
variables:
  ALLOWED_WARNINGS: 0
  ALLOWED_NOTES: 0
  NO_IMPORTS: 0

before_script:
  - Rscript -e "install.packages('remotes')"
  - Rscript -e "remotes::install_github('jumpingrivers/inteRgrate')"

check:
  script:
    - Rscript -e "inteRgrate::check_via_env(default = 'true')"

It leaves me following error message:

Installing package into ‘/usr/local/lib/R/site-library’
(as ‘lib’ is unspecified)
ERROR: dependencies ‘lintr’, ‘rcmdcheck’, ‘usethis’ are not available for package ‘inteRgrate’
* removing ‘/usr/local/lib/R/site-library/inteRgrate’
There were 11 warnings (use warnings() to see them)
$ Rscript -e "inteRgrate::check_lintr(path = '.')"
Error in loadNamespace(x) : there is no package called ‘inteRgrate’
Calls: loadNamespace -> withRestarts -> withOneRestart -> doWithOneRestart
Execution halted
Cleaning up project directory and file based variables
00:01
ERROR: Job failed: exit code 1