Fogot to define perl siteprefix variable.

component/perl/buildout.cfg

@@ -15,6 +15,7 @@ filename = ${:_buildout_section_name_}
 [perl]
 recipe = hexagonit.recipe.cmmi
 version = 5.14.0
+siteprefix = ${buildout:parts-directory}/site_${:_buildout_section_name_}
 url = http://www.cpan.org/src/5.0/perl-${:version}.tar.bz2
 md5sum = e7457deea78330c5f8eebb2fd2a45479
 patch-options = -p1
@@ -23,7 +24,7 @@ patches =
 configure-command =
   sh Configure -des \
     -Dprefix=${buildout:parts-directory}/${:_buildout_section_name_} \
-    -Dsiteprefix=${buildout:parts-directory}/site_${:_buildout_section_name_} \
+    -Dsiteprefix=${:siteprefix} \
     -Dcflags=-I${gdbm:location}/include \
     -Dldflags="-L${gdbm:location}/lib -Wl,-rpath=${gdbm:location}/lib" \
     -Ui_db \