diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 82bc33caf65..816f79c387c 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -108,26 +108,22 @@ jobs:
       name: Checkout the repository
       with:
         submodules: recursive
-    - name: Setup Python
-      uses: actions/setup-python@v2
-      with:
-        python-version: ${{ matrix.python-version }}
-        architecture: x64
     - name: Install Brew dependencies
-      run: brew install boost libomp
+      run: |
+        brew install boost libomp scons python@${{ matrix.python-version }}
     - name: Upgrade pip
       run: python3 -m pip install -U pip 'setuptools>=47.0.0,<48' wheel
     - name: Install Python dependencies
-      run: python3 -m pip install ruamel.yaml scons numpy cython h5py pandas pytest
+      run: python3 -m pip install ruamel.yaml numpy cython h5py pandas pytest
         pytest-github-actions-annotate-failures
     - name: Install typing_extensions for Python 3.7
       if: matrix.python-version == '3.7'
       run: python3 -m pip install typing_extensions
     - name: Build Cantera
-      run: python3 `which scons` build env_vars=all -j3 debug=n --debug=time
+      run: scons build env_vars=all -j3 debug=n --debug=time
     - name: Test Cantera
       run:
-        python3 `which scons` test show_long_tests=yes verbose_tests=yes --debug=time
+        scons test show_long_tests=yes verbose_tests=yes --debug=time
 
   # Coverage is its own job because macOS builds of the samples
   # use Homebrew gfortran which is not compatible for coverage
diff --git a/site_scons/buildutils.py b/site_scons/buildutils.py
index 7a981db158d..06eabdda671 100644
--- a/site_scons/buildutils.py
+++ b/site_scons/buildutils.py
@@ -1301,10 +1301,10 @@ def setup_python_env(env):
     env["site_packages"] = info["site_packages"]
     env["user_site_packages"] = info["user_site_packages"]
     if env["OS"] != "Windows":
-        env["py_libpath"] = info["LIBPL"]
+        env["py_libpath"] = [info["LIBPL"], info["LIBDIR"]]
         py_lib = "python" + info["py_version_short"] + info["abiflags"]
     else:
-        env["py_libpath"] = info["installed_base"] + "\\libs"
+        env["py_libpath"] = [info["installed_base"] + "\\libs"]
         py_lib = "python" + py_version_nodot
     env["py_libs"] = [py_lib] + [lib[2:] for lib in info.get("LIBS", "").split()
                                  if lib.startswith("-l")]
diff --git a/src/SConscript b/src/SConscript
index 36edf469ace..ce856f807cb 100644
--- a/src/SConscript
+++ b/src/SConscript
@@ -97,7 +97,7 @@ if env["python_package"] == "full":
     localenv.Append(LIBS=pyenv["py_libs"], LIBPATH=pyenv["py_libpath"])
     env["cantera_libs"].extend(pyenv["py_libs"])
     env.Append(LIBPATH=pyenv["py_libpath"])
-    env["extra_lib_dirs"].append(pyenv["py_libpath"])
+    env["extra_lib_dirs"].extend(pyenv["py_libpath"])
 
 # build the Cantera static library
 lib = build(localenv.StaticLibrary('../lib/cantera', libraryTargets,