diff --git a/modules/mono/config.py b/modules/mono/config.py
index b4e64332562..7c1846dcc2d 100644
--- a/modules/mono/config.py
+++ b/modules/mono/config.py
@@ -159,6 +159,7 @@ def configure(env):
             mono_so_name = ''
 
             tmpenv = Environment()
+            tmpenv.AppendENVPath('PKG_CONFIG_PATH', os.getenv('PKG_CONFIG_PATH'))
             tmpenv.ParseConfig('pkg-config monosgen-2 --libs-only-L')
 
             for hint_dir in tmpenv['LIBPATH']: