APT_PKGS list

.gitlab-ci.yml

 variables:
   _R_CHECK_CRAN_INCOMING_: "true"
   _R_CHECK_FORCE_SUGGESTS_: "true"
-  APT_PKGS: c("libcurl4-openssl-dev", "libxext-dev")
+  APT_PKGS: "libcurl4-openssl-dev" "libxext-dev"
 
 image: rocker/tidyverse
 
 before_script:
   - apt-get update
-  - apt-get install -y --no-install-recommends ${APT_PKGS}
+  - apt-get install -y --no-install-recommends ${cat APT_PKGS}
   - apt-get install -y --no-install-recommends qpdf pandoc pandoc-citeproc
   - R -e 'install.packages(c("testthat", "rmarkdown"));'
   - R -e "install.packages(c('parallel', 'data.table', 'ggplot2', 'gridExtra', 'glmmTMB', 'magrittr', 'MASS', 'reshape2', 'rlang', 'stats', 'utils', 'BiocManager', 'car'))"