diff --git a/.github/workflows/bundle_with_dakota_macos.yml b/.github/workflows/bundle_with_dakota_macos.yml
index 6871a909..a6c6c861 100644
--- a/.github/workflows/bundle_with_dakota_macos.yml
+++ b/.github/workflows/bundle_with_dakota_macos.yml
@@ -131,7 +131,7 @@ jobs:
         python_bin_include_lib="    using python : $python_version : $(python -c "from sysconfig import get_paths as gp; g=gp(); print(f\"$(which python) : {g['include']} : {g['stdlib']} ;\")")"
         sed -i '' "s|.*using python.*|$python_bin_include_lib|" project-config.jam
         cd /tmp/build/boost_${BOOST_VERSION_UNDERSCORES}
-        ./b2 install -j4 -a cxxflags="-std=c++17" --prefix=${GITHUB_WORKSPACE}/${INSTALL_DIR}i > build_boost.log
+        ./b2 install -j4 -a cxxflags="-std=c++17" --prefix=${GITHUB_WORKSPACE}/${INSTALL_DIR} > build_boost.log
 
     - name: Build dakota
       if: steps.cache-package.outputs.cache-hit != 'true'