diff --git a/.github/workflows/python-package.yml b/.github/workflows/python-package.yml
index e99e8c4f..24aa10ed 100644
--- a/.github/workflows/python-package.yml
+++ b/.github/workflows/python-package.yml
@@ -13,8 +13,8 @@ jobs:
       matrix:
         python-version: [ "3.9", "3.10" ]
         # solver: ["classic", "libmamba"]
-        os: [ubuntu-latest, macos-latest]
-        # os: [ubuntu-latest]
+        # os: [ubuntu-latest, macos-latest]
+        os: [ubuntu-latest]
     steps:
     - name: Install system development tools
       if: startsWith(runner.os, 'Linux')
@@ -49,7 +49,7 @@ jobs:
     - uses: actions/checkout@v4
     - uses: conda-incubator/setup-miniconda@v3
       name: setup-Mambaforge
-      continue-on-error: true
+      # continue-on-error: true
       with:
         # python-version: "3.9"
         python-version: ${{ matrix.python-version }}
@@ -63,8 +63,14 @@ jobs:
         environment-file: ./environment.yml
         use-mamba: true
         use-only-tar-bz2: true  # IMPORTANT: This needs to be set for caching to work properly!
+    - name: Verify conda environment
+      run: |
+        conda info --envs
+        source activate mikado2
+        conda list
     - name: Install dependencies
       run: |
+        source activate mikado2
         python --version
         gcc --version
         pip --version