--- a/SConstruct	2021-10-31 20:42:44.232084185 -0400
+++ b/SConstruct	2021-10-31 20:42:54.063024444 -0400
@@ -36,7 +36,7 @@
     with open(target[0].get_path(), "w") as fout:
         fout.write("// autogenerated by scons Bin2H builder, do not edit by hand!\n\n")
 
-        if env.has_key("BIN2H_NAMESPACE"):
+        if "BIN2H_NAMESPACE" in env:
             fout.write("namespace %s {\n\n" % env["BIN2H_NAMESPACE"])
             
         # write down data
@@ -62,7 +62,7 @@
                                     for src in source], ",\n"))
             fout.write("\n}\n\n")
 
-        if env.has_key("BIN2H_NAMESPACE"):
+        if "BIN2H_NAMESPACE" in env:
             fout.write("} // namespace %s\n\n" % env["BIN2H_NAMESPACE"])
                 
         fout.write("/* EOF */\n")