Consult CMAKE_PREFIX_PATH only when VIRTUAL_ENV is empty

Author: knoepfel

plugins/python/src/pymodule.cpp

@@ -146,8 +146,10 @@ static bool initialize()
   // FIXME: Spack does not set PYTHONPATH or VIRTUAL_ENV, but it does set
   //        CMAKE_PREFIX_PATH. Add site-packages directories from CMAKE_PREFIX_PATH
   //        to sys.path so Python can find packages in Spack views.
-  if (char const* cmake_prefix_path = std::getenv("CMAKE_PREFIX_PATH")) {
-    add_cmake_prefix_paths_to_syspath(cmake_prefix_path);
+  if (!std::getenv("VIRTUAL_ENV")) {
+    if (char const* cmake_prefix_path = std::getenv("CMAKE_PREFIX_PATH")) {
+      add_cmake_prefix_paths_to_syspath(cmake_prefix_path);
+    }
   }
 
   // load numpy (see also above, if already initialized)