Use bison in kerberos component

component/kerberos/buildout.cfg

@@ -3,6 +3,9 @@
 parts =
     kerberos
 
+extends = 
+  ../../component/bison/buildout.cfg
+
 [kerberos-package]
 recipe = hexagonit.recipe.download
 url = http://web.mit.edu/kerberos/dist/krb5/1.10/krb5-1.10.2-signed.tar
@@ -14,3 +17,6 @@ url = ${kerberos-package:location}/krb5-1.10.2.tar.gz
 configure-command = src/configure
 configure-options =
     --prefix=${buildout:parts-directory}/${:_buildout_section_name_}
+
+environment =
+  PATH=${bison:location}/bin:%(PATH)s
\ No newline at end of file