diff --git a/SConscript b/SConscript
index 5136757..8f899ba 100644
--- a/SConscript
+++ b/SConscript
@@ -70,13 +70,13 @@ def _find_system_cache_dir() -> str:
     if os.name == 'posix':
         if 'XDG_CACHE_HOME' in os.environ:
             return os.environ['XDG_CACHE_HOME']
-        else:
+        elif 'HOME' in os.environ:
             return os.path.join(os.environ['HOME'], '.cache')
     elif os.name == 'nt':
         # TODO: just guessing
         return os.environ['LocalAppData']
-    else: # fallback
-        return Dir('#cache').abspath
+    # fallback
+    return Dir('#cache').abspath
 
 Import('config')