diff --git a/scripts/_common.sh b/scripts/_common.sh
index 75c1b47..01640c8 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -1,4 +1,3 @@
 #!/bin/bash
-
 pkg_dependencies="build-essential cmake libssl-dev libcurl4-openssl-dev libxml2-dev libxslt-dev imagemagick ghostscript curl libmagickwand-dev git libpq-dev redis-server nodejs postgresql bison "
-ruby_build_dependencies="bison libffi-dev libgdbm-dev libncurses5-dev libsqlite3-dev libyaml-dev pkg-config sqlite3 zlib1g-dev libgmp-dev libreadline-dev libssl-dev"
+ruby_build_dependencies="bison libffi-dev libgdbm-dev libncurses5-dev libsqlite3-dev libyaml-dev pkg-config sqlite3 zlib1g-dev libgmp-dev libreadline-dev libssl-dev libjemalloc-dev"
diff --git a/scripts/bundle_app b/scripts/bundle_app
index 333864d..c2c9c77 100644
--- a/scripts/bundle_app
+++ b/scripts/bundle_app
@@ -1,22 +1,22 @@
 #!/bin/bash
 pushd $final_path/diaspora
-# here we *absolutely* need bash (not dash) because dash does not understand what rvm puts in .profile
-# (wtf rvm for assuming everybody uses bash as default shell??)
-# we also need a login shell to make sure .profile is loaded
-sudo -u $app /bin/bash --login << EOF
-rvm use --default 2.4
-rvm 2.4 do gem install bundler:1.17.3
+echo 2.6.6 > .ruby-version # overwrite 2.4 default from diaspora because rbenv does not understand it
+sudo -u $app --login << EOF
+gem install bundler:1.17.3
+cd diaspora
 script/configure_bundler
 bin/bundle install --full-index --with=postgresql
 EOF
-sudo -u $app /bin/bash --login << EOF
+sudo -u $app --login << EOF
+cd diaspora
 RAILS_ENV=production bundle exec rake db:migrate
 EOF
 
 #=================================================
 # ASSETS PRECOMPILATION
 #=================================================
-sudo -u $app /bin/bash --login << EOF
+sudo -u $app --login << EOF
+cd diaspora
 RAILS_ENV=production bin/rake assets:precompile
 EOF
 popd
diff --git a/scripts/install b/scripts/install
index 4da125c..6f8b1b7 100755
--- a/scripts/install
+++ b/scripts/install
@@ -11,9 +11,6 @@ can_remove_db=0
 can_remove_home=0
 can_remove_user=0
 
-# flag to make clean_setup display rvm log if rvm build has failed
-should_display_rvm_log=0
-
 #=================================================
 # GENERIC START
 #=================================================
@@ -27,12 +24,6 @@ source /usr/share/yunohost/helpers
 # MANAGE SCRIPT FAILURE
 #=================================================
 # Exit if an error occurs during the execution of the script
-ynh_clean_setup() {
-  # print rvm logs
-  if [ $should_display_rvm_log -eq 1 ]; then
-    find $final_path/.rvm/log/ -name make.log -exec cat {} \;
-  fi
-}
 ynh_abort_if_errors
 
 #=================================================
@@ -101,7 +92,7 @@ chown $app:www-data $final_path
 # INSTALL RVM AND RUBY FOR CURRENT USER
 #=================================================
 ynh_script_progression --message="Installing rvm and ruby..." --weight=240
-source ./install_rvm_ruby
+source ./install_ruby
 
 #=================================================
 # DOWNLOAD, CHECK AND UNPACK SOURCE
diff --git a/scripts/install_ruby b/scripts/install_ruby
new file mode 100644
index 0000000..3cdbe0f
--- /dev/null
+++ b/scripts/install_ruby
@@ -0,0 +1,18 @@
+#!/bin/bash
+# some stuff we don't care about really.
+# clone ynh_experimental helpers
+pushd $final_path
+if [ -x Experimental_helpers ]; then
+  pushd Experimental_helpers
+  git fetch
+  popd
+else
+  git clone https://github.com/YunoHost-Apps/Experimental_helpers.git
+fi
+pushd Experimental_helpers
+git checkout 606b60cf6bb3906d32020392f0a824d1f9971e96
+source ./ynh_install_ruby/ynh_install_ruby
+popd
+popd
+ynh_install_ruby --ruby_version=2.6.6
+
diff --git a/scripts/install_rvm_ruby b/scripts/install_rvm_ruby
deleted file mode 100644
index bc0c87e..0000000
--- a/scripts/install_rvm_ruby
+++ /dev/null
@@ -1,17 +0,0 @@
-#!/bin/bash
-# some stuff we don't care about really.
-cp -v ../conf/piotr.kuczynski\@gmail.com.pgp ../conf/mpapis\@gmail.com.pgp $final_path
-chown $app:$app $final_path/piotr.kuczynski\@gmail.com.pgp $final_path/mpapis\@gmail.com.pgp
-sudo -u $app gpg --import $final_path/piotr.kuczynski\@gmail.com.pgp $final_path/mpapis\@gmail.com.pgp
-pushd $final_path
-sudo -u $app curl -sSL https://get.rvm.io | sudo -u $app bash -s stable
-sudo -u $app $final_path/.rvm/bin/rvm autolibs read-fail
-# avoid some issues where /tmp is not big enough
-export TMPDIR=$final_path/.gcc_tmp
-sudo -u $app mkdir -p $TMPDIR
-# unfortunately no prebuilt for debian... this will be long
-should_display_rvm_log=1
-sudo -u $app TMPDIR=$TMPDIR $final_path/.rvm/bin/rvm install 2.4 
-should_display_rvm_log=0
-popd
-
diff --git a/scripts/remove b/scripts/remove
index a73a452..10c18b7 100644
--- a/scripts/remove
+++ b/scripts/remove
@@ -87,6 +87,13 @@ if [ $can_remove_user -eq 1 ]; then
   ynh_system_user_delete $app
 fi
 
+#=================================================
+# REMOVE RUBY
+#=================================================
+ynh_script_progression --message="Remove ruby (if this is the last app using it)"
+source $final_path/Experimental_helpers/ynh_install_ruby/ynh_install_ruby
+ynh_remove_ruby
+
 #=================================================
 # REMOVE APP MAIN DIR
 #=================================================
diff --git a/scripts/restore b/scripts/restore
index 1c379d3..90551d1 100644
--- a/scripts/restore
+++ b/scripts/restore
@@ -69,7 +69,7 @@ chown $app:www-data $final_path
 # INSTALL RVM AND RUBY FOR CURRENT USER
 #=================================================
 ynh_script_progression --message="Reinstalling rvm and ruby..." --weight=50
-source ./install_rvm_ruby
+source ./install_ruby
 
 #=================================================
 # DOWNLOAD, CHECK AND UNPACK SOURCE