diff --git a/tools/gha_osx.sh b/tools/gha_osx.sh
index 31232aa64..f7777f846 100644
--- a/tools/gha_osx.sh
+++ b/tools/gha_osx.sh
@@ -13,7 +13,7 @@ export PATH="$HOME/miniconda/bin:$PATH"
 bash miniconda.sh -b -p $HOME/miniconda
 conda config --add channels conda-forge
 conda config --set channel_priority strict
-conda create -y -q -p $deps_dir c-compiler cxx-compiler libcxx cmake eigen nlopt ipopt "boost-cpp<1.86" tbb tbb-devel
+conda create -y -q -p $deps_dir c-compiler cxx-compiler "libcxx<17" cmake eigen nlopt ipopt "boost-cpp<1.86" tbb tbb-devel
 source activate $deps_dir
 
 # Create the build dir and cd into it.