diff --git a/component/geoip2/buildout.cfg b/component/geoip2/buildout.cfg
index 944283299b36f4119eb0a2d11be07fdbdeb7862a..8f7b4657d7441e30216561b6efdb8680e25fdc45 100644
--- a/component/geoip2/buildout.cfg
+++ b/component/geoip2/buildout.cfg
@@ -16,6 +16,7 @@ rpath = ${:library-dirs}
 
 [geolite2-country]
 recipe = slapos.recipe.build:download-unpacked
+shared = true
 url = http://geolite.maxmind.com/download/geoip/database/GeoLite2-Country.tar.gz#${:md5sum}
 md5sum = dc6224c648350d90f344a0c5c3ca5474
 strip-top-level-dir = true
diff --git a/component/noVNC/buildout.cfg b/component/noVNC/buildout.cfg
index b34c31f49b987fcea4d00a960bdeebd28d06c496..052278c2fbbd7f616c96d2339207ed270a6aeee4 100644
--- a/component/noVNC/buildout.cfg
+++ b/component/noVNC/buildout.cfg
@@ -4,6 +4,7 @@ parts =
 
 [noVNC]
 recipe = slapos.recipe.build:download-unpacked
+shared = true
 url = https://github.com/novnc/noVNC/archive/refs/tags/v1.2.0.tar.gz
 md5sum = 290dfabc4ecdd58d62ccb8c34a922962
 strip-top-level-dir = true
diff --git a/component/tomcat/buildout.cfg b/component/tomcat/buildout.cfg
index 7bec0abe3ab69c698e7a38531c9766a2189b9d88..96b613d3c82af1e322fa2bd2dac86e137c64eeee 100644
--- a/component/tomcat/buildout.cfg
+++ b/component/tomcat/buildout.cfg
@@ -11,7 +11,7 @@ parts =
 
 [tomcat7]
 recipe = slapos.recipe.build:download-unpacked
-ignore-existing = true
+shared = true
 strip-top-level-dir = true
 url = https://archive.apache.org/dist/tomcat/tomcat-7/v${:version}/bin/apache-tomcat-${:version}.tar.gz
 version = 7.0.100
@@ -19,7 +19,7 @@ md5sum = 79be4ba5a6e770730a4be3d5cb3c7862
 
 [tomcat9]
 recipe = slapos.recipe.build:download-unpacked
-ignore-existing = true
+shared = true
 strip-top-level-dir = true
 url = https://archive.apache.org/dist/tomcat/tomcat-9/v${:version}/bin/apache-tomcat-${:version}.tar.gz
 version = 9.0.12
diff --git a/component/yarn/buildout.cfg b/component/yarn/buildout.cfg
index 763f1361878bf024658ceae4567eeeb5f814807d..37c5c528797434c4f4b197f5465cc4f4ec8567e7 100644
--- a/component/yarn/buildout.cfg
+++ b/component/yarn/buildout.cfg
@@ -35,6 +35,7 @@ bin-yarn = ${:rendered}
 
 [yarn-download]
 recipe = slapos.recipe.build:download-unpacked
+shared = true
 url = https://github.com/yarnpkg/yarn/releases/download/v${:version}/yarn-v${:version}.tar.gz
 
 [yarn-download-1.22.10]
diff --git a/software/kvm/software.cfg b/software/kvm/software.cfg
index 86cc6ef961348057c79906fb55e42185daba3165..daac33cc32443a4d2e16b46b642db6a94e695b12 100644
--- a/software/kvm/software.cfg
+++ b/software/kvm/software.cfg
@@ -60,6 +60,7 @@ scripts =
 [http-proxy]
 # https://github.com/nodejitsu/node-http-proxy
 recipe = slapos.recipe.build:download-unpacked
+shared = true
 #XXX-Cedric : use upstream when merged
 url = https://nodeload.github.com/desaintmartin/node-http-proxy/zipball/20120621
 md5sum = 20204d0b29c2cef26e1c91e99eedca6b
@@ -67,6 +68,7 @@ md5sum = 20204d0b29c2cef26e1c91e99eedca6b
 [proxy-by-url]
 # https://github.com/dominictarr/proxy-by-url
 recipe = slapos.recipe.build:download-unpacked
+shared = true
 #XXX-Cedric : use upstream when merged
 url = https://nodeload.github.com/desaintmartin/proxy-by-url/zipball/20120621
 md5sum = c2609948aa708581f93b981b23880314