1diff --git a/supportlib/SConstruct b/supportlib/SConstruct
2index 7f797b9..07907e9 100644
3--- a/supportlib/SConstruct
4+++ b/supportlib/SConstruct
5@@ -5,7 +5,7 @@
6 # library.
7 ######################################################################
8
9-import sys, glob, os.path
10+import sys, glob, os.path, os
11
12 # Read the options
13 vars = Variables("cpp_config.cfg")
14@@ -16,7 +16,7 @@ vars.Add("CPPPATH", "The include directories", [])
15 vars.Add("MSVS_VERSION", "The preferred version of MS Visual Studio")
16
17 # Create the construction environment
18-env = Environment(variables = vars)
19+env = Environment(variables = vars, ENV = os.environ)
20
21 # Build the files in "obj"
22 env.VariantDir("obj", "src", duplicate=0)