Update

Author: njacazio

ALICE3/Core/FastTracker.h

@@ -22,6 +22,7 @@
 #include <TEnv.h>
 #include <THashList.h>
 #include <TObject.h>
+#include <TSystem.h>
 
 #include <map>
 #include <string>
@@ -48,6 +49,11 @@ class GeometryContainer
   static std::map<std::string, std::map<std::string, std::string>> parseTEnvConfiguration(std::string filename)
   {
     std::map<std::string, std::map<std::string, std::string>> configMap;
+    if (filename.find('$') != std::string::npos) {
+      // Expand environment variables in filename
+      const char* expanded = gSystem->ExpandPathName(filename.c_str());
+      filename = expanded;
+    }
     TEnv env(filename.c_str());
     THashList* table = env.GetTable();
     std::vector<std::string> layers;