--- a/BlockOut/Makefile	
+++ a/BlockOut/Makefile	
@@ -71,6 +71,10 @@ LFLAGS   =      -L $(SDL_LIBS) \
 
 endif
 
+ifdef GAME_DATA_PREFIX
+CXXFLAGS += -DBL2_HOME=\"$(GAME_DATA_PREFIX)\"
+endif
+
 
 #--------------------------------------------------------------------
 
--- a/BlockOut/Utils.cpp	
+++ a/BlockOut/Utils.cpp	
@@ -206,13 +206,21 @@ BOOL CheckEnv() {
     printf("Please set the HOME variable to your home directory (ex: HOME=/users/jeanluc)\n");
     return FALSE;
   }
-    
+
+#ifndef BL2_HOME
+
   char *blockoutHome = getenv("BL2_HOME");
   if( blockoutHome==NULL ) {
     printf("BL2_HOME environement variable if not defined !\n");
     printf("Please set the BL2_HOME to the BlockOut II installation directory (ex: BL2_HOME=/usr/local/bl2).\n");
     return FALSE;
   }
+#else
+
+  char const *blockoutHome = BL2_HOME;
+
+#endif
+
   strcpy( bl2Home , blockoutHome );
     
   char bl2Dir[512];