diff --git a/tasks/r-packages-install.yml b/tasks/r-packages-install.yml
index 0208390..b78bed4 100644
--- a/tasks/r-packages-install.yml
+++ b/tasks/r-packages-install.yml
@@ -29,14 +29,14 @@
 - block:
   - name: Install the R devtools package from CRAN
     command: >
-      Rscript --slave --no-save --no-restore-history -e "if (! ('devtools' %in% installed.packages()[,'Package'])) { install.packages(pkgs='devtools', repos=c('https://cloud.r-project.org/')); print('Added'); } else { print('Already installed'); }"
+      Rscript --slave --no-site-file --no-init-file --no-save --no-restore-history -e "if (! ('devtools' %in% installed.packages()[,'Package'])) { install.packages(pkgs='devtools', repos=c('https://cloud.r-project.org/')); print('Added'); } else { print('Already installed'); }"
     register: install_devtools_result
     failed_when: "install_devtools_result.rc != 0 or 'had non-zero exit status' in install_devtools_result.stderr"
     changed_when: "'Added' in install_devtools_result.stdout"
 
   - name: Install R packages from the cran sources repo or from an alternative repository, latest available version.
     command: >
-      Rscript --slave --no-save --no-restore-history -e "if (! ('{{ item.name }}' %in% installed.packages()[,'Package'])) { require(devtools); require(methods) ; install.packages(pkgs='{{ item.name }}', repos=c('{{ item.repo | default ('https://cloud.r-project.org') }}/')); print('Added'); } else { print('Already installed'); }"
+      Rscript --slave --no-site-file --no-init-file --no-save --no-restore-history -e "if (! ('{{ item.name }}' %in% installed.packages()[,'Package'])) { require(devtools); require(methods) ; install.packages(pkgs='{{ item.name }}', repos=c('{{ item.repo | default ('https://cloud.r-project.org') }}/')); print('Added'); } else { print('Already installed'); }"
     register: install_plugins_result
     failed_when: "install_plugins_result.rc != 0 or 'had non-zero exit status' in install_plugins_result.stderr"
     changed_when: "'Added' in install_plugins_result.stdout"
@@ -50,7 +50,7 @@
     
   - name: Install R packages from the cran sources, specific versions.
     command: >
-      Rscript --slave --no-save --no-restore-history -e "if (! ('{{ item.name }}' %in% installed.packages()[,'Package'])) { install.packages('{{ r_source_plugins_dest_dir }}/{{ item.source }}', repos = NULL, type='source'); print('Added'); } else if (packageVersion('{{ item.name }}') != '{{ item.version }}') { require(devtools); require(methods) ; install.packages('{{ r_source_plugins_dest_dir }}/{{ item.source }}', repos = NULL, type='source'); print('Added'); } else { print('Already Installed'); }"
+      Rscript --slave --no-site-file --no-init-file --no-save --no-restore-history -e "if (! ('{{ item.name }}' %in% installed.packages()[,'Package'])) { install.packages('{{ r_source_plugins_dest_dir }}/{{ item.source }}', repos = NULL, type='source'); print('Added'); } else if (packageVersion('{{ item.name }}') != '{{ item.version }}') { require(devtools); require(methods) ; install.packages('{{ r_source_plugins_dest_dir }}/{{ item.source }}', repos = NULL, type='source'); print('Added'); } else { print('Already Installed'); }"
     register: install_s_plugins_result
     failed_when: "install_s_plugins_result.rc != 0 or 'had non-zero exit status' in install_s_plugins_result.stderr"
     changed_when: '"Added" in install_s_plugins_result.stdout'
@@ -60,7 +60,7 @@
 
   - name: Install R packages from github
     command: >
-      Rscript --slave --no-save --no-restore-history -e "if (! ('{{ item.plugin_name }}' %in% installed.packages()[,'Package'])) { require(devtools); require(methods) ; options(repos='{{ r_cran_mirror_site }}/') ; install_github('{{ item.github_user }}/{{ item.plugin_name }}'); print('Added'); } else { print('Already Installed'); }"
+      Rscript --slave --no-site-file --no-init-file --no-save --no-restore-history -e "if (! ('{{ item.plugin_name }}' %in% installed.packages()[,'Package'])) { require(devtools); require(methods) ; options(repos='{{ r_cran_mirror_site }}/') ; install_github('{{ item.github_user }}/{{ item.plugin_name }}'); print('Added'); } else { print('Already Installed'); }"
     register: install_github_plugins_result
     failed_when: "install_github_plugins_result.rc != 0 or 'had non-zero exit status' in install_github_plugins_result.stderr"
     changed_when: "'Added' in install_github_plugins_result.stdout"
@@ -70,7 +70,7 @@
 
   - name: Remove R unwanted packages
     command: >
-      Rscript --slave --no-save --no-restore-history -e "if (! ('{{ item }}' %in% installed.packages()[,'Package'])) { print('Not installed'); } else { remove.packages(pkgs='{{ item }}'); print('Removed'); }"
+      Rscript --slave --no-site-file --no-init-file --no-save --no-restore-history -e "if (! ('{{ item }}' %in% installed.packages()[,'Package'])) { print('Not installed'); } else { remove.packages(pkgs='{{ item }}'); print('Removed'); }"
     register: remove_plugins_result
     failed_when: remove_plugins_result.rc != 0
     changed_when: "'Removed' in remove_plugins_result.stdout"