Make sure we have done the right thing

packages/py-spinnfrontendcommon/package.py

@@ -6,6 +6,7 @@
 from spack.package import *
 from spack.fetch_strategy import URLFetchStrategy
 from spack.store import find
+import os
 
 _JAR_URL = "https://github.com/SpiNNakerManchester/JavaSpiNNaker/releases/download/7.0.0/spinnaker-exe.jar"
 _JAR_SHA256 = "2d909c7fb3aa15886acf26febb1bd48e25db0c347a231944aa6a5f86107bb55b"
@@ -32,8 +33,17 @@ class PySpinnfrontendcommon(PythonPackage):
 
     def install(self, spec, prefix):
         super(PySpinnfrontendcommon, self).install(spec, prefix)
+
         # Work out the python version installed, so we know where to put
         # the java code!
         python_spec = find("python@3.7:")[0]
-        python_lib = f"python{python_spec.version}"
-        install_tree("JavaSpiNNaker", prefix.lib.join(python_lib).site_packages)
+        python_version_parts = python_spec.version.split('.')
+        python_version = ".".join(python_version_parts[0:2])
+        python_lib = f"python{python_version}"
+        site_packages = prefix.lib.join(python_lib).site_packages
+        install_tree("JavaSpiNNaker", site_packages)
+
+        # Test where things are now installed
+        for root, dirnames, filenames in os.walk(site_packages):
+            for filename in filenames:
+                print(os.path.join(root, filename))