p7zip,qemu: install in shared mode

component/p7zip/buildout.cfg

@@ -4,6 +4,7 @@ parts =
 
 [p7zip]
 recipe = slapos.recipe.cmmi
+shared = true
 url = http://downloads.sf.net/project/p7zip/p7zip/${:version}/p7zip_${:version}_src_all.tar.bz2
 version = 9.38.1
 md5sum = 6cba8402ccab2370d3b70c5e28b3d651
@@ -11,4 +12,4 @@ configure-command = rm -r DOC
 make-binary =
 make-options =
 make-targets = make -j1 7z install
-  DEST_HOME=${buildout:parts-directory}/${:_buildout_section_name_}
+  DEST_HOME=@@LOCATION@@

component/qemu-kvm/buildout.cfg

@@ -15,6 +15,7 @@ extends =
 
 [qemu]
 recipe = slapos.recipe.cmmi
+shared = true
 url = https://download.qemu.org/qemu-4.1.1.tar.xz
 md5sum = 53879f792ef2675c6c5e6cbf5cc1ac6c
 configure-options =