@@ -204,11 +204,12 @@ class Utilities:

         if not os.path.isdir(Build_Config.generatedDataPath):

             cmdUtils.runCommandInShell("mkdir -p " + Build_Config.generatedDataPath)

-        if configdict["targetName"] in ["pkgtree", "who-needs", "print-upward-deps"] and "pkg" not in os.environ:

-            raise Exception("pkg not present in os.environ")

-        elif configdict["targetName"] in ["pkgtree", "who-needs", "print-upward-deps"]:

-            self.pkg = os.environ["pkg"]

-            self.display_option = "tree"

+        if configdict["targetName"] in ["pkgtree", "who_needs", "print_upward_deps"]:

+            if "pkg" not in os.environ:

+                raise Exception("Please provide environment variable pkg as make <target> pkg=<pkg-name>")

+            else:

+                self.pkg = os.environ["pkg"]

+                self.display_option = "tree"

         if configdict["targetName"] == "imgtree" and "img" not in os.environ:

             raise Exception("img not present in os.environ")