use relative path for extends and use download-unpacked recipe

software/phpbms/software.cfg

@@ -12,8 +12,7 @@ parts =
   patch
 
 extends =
-  http://git.erp5.org/gitweb/slapos.git/blob_plain/refs/heads/lamp:/stack/lamp.cfg
-  http://git.erp5.org/gitweb/slapos.git/blob_plain/refs/heads/lamp:/stack/shacache-client.cfg
+  ../../stack/lamp.cfg
 
 [phpbms-patch]
 recipe = slapos.recipe.download
@@ -24,14 +23,9 @@ location = ${buildout:parts-directory}/${:_buildout_section_name_}
 filename = phpbms_for_mysql5.patch
 
 [application]
-recipe = slapos.recipe.build
+recipe = slapos.recipe.build:download-unpacked
 url = http://www.phpbms.org/files/phpbms/phpbms-0.98.tar.gz
 md5sum = 3907c5115cf9acaab7cb5d22ce0534b7
-script =
-  if not self.options.get('url'): self.options['url'], self.options['md5sum'] = self.options[guessPlatform()].split(' ')
-  extract_dir = self.extract(self.download(self.options['url'], self.options.get('md5sum')))
-  workdir = guessworkdir(extract_dir)
-  self.copyTree(workdir, "${buildout:parts-directory}/${:_buildout_section_name_}")
 
 [patch]
 recipe = iw.recipe.cmd