See if this helps us to see what is installed!

packages/py-spinnfrontendcommon/package.py

@@ -6,6 +6,7 @@
 from spack.package import *
 from spack.fetch_strategy import URLFetchStrategy
 from spack.store import find
+from llnl.util import tty
 import os
 
 _JAR_URL = "https://github.com/SpiNNakerManchester/JavaSpiNNaker/releases/download/7.0.0/spinnaker-exe.jar"
@@ -43,6 +44,7 @@ class PySpinnfrontendcommon(PythonPackage):
         install_tree("JavaSpiNNaker", site_packages)
 
         # Test where things are now installed
+        tty.debug(f"Checking contents of {site_packages}")
         for root, dirnames, filenames in os.walk(site_packages):
             for filename in filenames:
-                print(os.path.join(root, filename))
+                tty.debug(os.path.join(root, filename))