diff --git a/software/mysql-5.1/software.cfg b/software/mysql-5.1/software.cfg
index 7b977c415fbdf4e1b35966434d5bc8dec363610b..08ff3448f2ed8c427551a959b35c58e5d1c6f8ea 100644
--- a/software/mysql-5.1/software.cfg
+++ b/software/mysql-5.1/software.cfg
@@ -81,3 +81,9 @@ plone.recipe.command = 1.1
 
 # Use SlapOS patched zc.buildout
 zc.buildout = 1.5.3-dev-SlapOS-005
+
+# XXX: Very dirty workaround
+# XXX: Pin slapos.libnetworkcache, as version higher than 0.3 depends on
+# XXX: M2Crypto which installation is not defined yet
+# XXX: Note, that slapos.libnetworkcache is buildout "internal" dependency
+slapos.libnetworkcache = 0.3