diff --git a/pygraphviz/agraph.py b/pygraphviz/agraph.py
index d539ba0..f5bac3f 100644
--- a/pygraphviz/agraph.py
+++ b/pygraphviz/agraph.py
@@ -1792,7 +1792,7 @@ class AGraph:
         if platform.system() == "Windows":
             name += ".exe"
 
-        paths = os.environ["PATH"]
+        paths = '@path@'
         for path in paths.split(os.pathsep):
             match = glob.glob(os.path.join(path, name))
             if match: