diff --git a/.github/workflows/build_wheels.yml b/.github/workflows/build_wheels.yml
index 7d21ca4d..3740de49 100644
--- a/.github/workflows/build_wheels.yml
+++ b/.github/workflows/build_wheels.yml
@@ -87,8 +87,9 @@ jobs:
         if: runner.os == 'Windows'
         env:
           UDA_DIR: ${{github.workspace}}\install
+          EXTLIB_INSTALL_DIR: ${{github.workspace}}\extlib\install
         run: >
-          gcm python3 &&
+          (gcm python3).Path &&
           python3 -m venv ${{github.workspace}}/venv &&
           ls ${{github.workspace}}/venv &&
           ${{github.workspace}}/venv/Scripts/Activate.ps1 &&
diff --git a/source/wrappers/python/setup.py.in b/source/wrappers/python/setup.py.in
index a274cf59..a3e42e5c 100644
--- a/source/wrappers/python/setup.py.in
+++ b/source/wrappers/python/setup.py.in
@@ -33,8 +33,8 @@ else:
     stalib_ext = 'a'
     dynlib_ext = '.dll'
     extra_compile_args = ['/-std:c++17']
-    extlib = os.environ.get("EXTLIB_DIR")
-    extra_includes = [os.path.join(extlib, "install", "include")]
+    extlib = os.environ.get("EXTLIB_INSTALL_DIR")
+    extra_includes = [os.path.join(extlib, "include")]
 
 
 uda_lib_names = '@UDA_LIBS@'.split(';') if '@UDA_LIBS@' else []