make sure submodule is added in the correct location

var/spack/packages/py-astropy/package.py

@@ -7,6 +7,7 @@ class PyAstropy(Package):
             url="https://pypi.python.org/packages/source/a/astropy/astropy-0.4.2.tar.gz")
 
     extends("python")
+    depends_on("py-numpy")
 
     def install(self, spec, prefix):
         python("setup.py", "install", "--prefix=%s" % prefix)

var/spack/packages/py-jsonschema/package.py

@@ -11,6 +11,8 @@ class PyJsonschema(Package):
 
     extends("python")
     depends_on("py-setuptools@18.1")
+    depends_on("py-vcversioner")
+    depends_on("py-functools32")
 
     def install(self, spec, prefix):
         python('setup.py', 'install', '--prefix=%s' % prefix)