diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 8cac4db4..625f37c9 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -9,13 +9,11 @@ R 3:
       - apt-get update
       # install dependencies for package
       - apt-get install --yes --no-install-recommends libxml2-dev libssl-dev libcurl4-openssl-dev zlib1g-dev
-      - Rscript -e 'install.packages(c("devtools", "rlang"))'
-      - Rscript -e 'devtools::install_dev_deps(repos = "https://cran.rstudio.com")'
+      - Rscript -e 'install.packages(c("devtools", "rlang"), repos = 'https://cran.rstudio.com', type = 'binary')'
+      - Rscript -e 'devtools::install_dev_deps(repos = "https://cran.rstudio.com", type = 'binary')'
       # remove vignettes folder and get VignetteBuilder field out of DESCRIPTION file
       - rm -rf vignettes
       - Rscript -e 'd <- read.dcf("DESCRIPTION"); d[, colnames(d) == "VignetteBuilder"] <- NA; write.dcf(d, "DESCRIPTION")'
-      # set environmental variable
-      - Rscript -e 'Sys.setenv(NOT_CRAN = "true")'
       # build package
       - R CMD build . --no-build-vignettes --no-manual
       - PKG_FILE_NAME=$(ls -1t *.tar.gz | head -n 1)
@@ -37,9 +35,9 @@ pages:
   image: debian:buster-slim
   script:
     - apt-get update && apt-get -y install libxml2-dev libssl-dev libcurl4-openssl-dev pandoc r-base
-    - Rscript -e "install.packages(c('pkgdown', 'devtools'), repos = 'http://cran.rstudio.com')"
-    - Rscript -e "devtools::install_dev_deps(repos = 'https://cran.rstudio.com')"
-    - Rscript -e "devtools::build()"
+    - Rscript -e "install.packages(c('pkgdown', 'devtools'), repos = 'http://cran.rstudio.com', type = 'binary')"
+    - Rscript -e "devtools::install_dev_deps(repos = 'https://cran.rstudio.com', type = 'binary')"
+    - Rscript -e "devtools::install(build = TRUE, upgrade = FALSE)"
     - R -e "pkgdown::build_site()"
   artifacts:
     paths: