diff --git a/osx_utils.sh b/osx_utils.sh
index 689a9ac8..e43319e9 100644
--- a/osx_utils.sh
+++ b/osx_utils.sh
@@ -177,8 +177,8 @@ function pyinst_fname_for_version {
     # we set the env variable _PYTHON_HOST_PLATFORM to change this
     # default.
     if [ -z "$2" ]; then
-        if [ $(lex_ver $_ver) -ge $(lex_ver 3.8.10) ] \
-            && [ $(lex_ver $_ver) -lt $(lex_ver 3.10.0) ]; then
+        if [ $(lex_ver $py_version) -ge $(lex_ver 3.8.10) ] \
+            && [ $(lex_ver $py_version) -lt $(lex_ver 3.10.0) ]; then
             if [ $(uname -m) == "x86_64" ]; then
                 py_osx_ver="10.9"
             else