diff --git a/.github/workflows/deploy_conda.yml b/.github/workflows/deploy_conda.yml
index c797ef6d..60d84722 100644
--- a/.github/workflows/deploy_conda.yml
+++ b/.github/workflows/deploy_conda.yml
@@ -21,7 +21,6 @@ jobs:
         uses: conda-incubator/setup-miniconda@v3
         with:
           miniforge-version: latest
-          miniforge-variant: Mambaforge
           activate-environment: mslice-env
           environment-file: environment.yml
           auto-activate-base: false
diff --git a/.github/workflows/deploy_conda_nightly.yml b/.github/workflows/deploy_conda_nightly.yml
index 77add5ab..2afcc14b 100644
--- a/.github/workflows/deploy_conda_nightly.yml
+++ b/.github/workflows/deploy_conda_nightly.yml
@@ -30,7 +30,6 @@ jobs:
         uses: conda-incubator/setup-miniconda@v3
         with:
           miniforge-version: latest
-          miniforge-variant: Mambaforge
           activate-environment: mslice-env
           environment-file: environment.yml
           auto-activate-base: false
diff --git a/.github/workflows/unit_tests.yml b/.github/workflows/unit_tests.yml
index a25903ff..75c2a7e5 100644
--- a/.github/workflows/unit_tests.yml
+++ b/.github/workflows/unit_tests.yml
@@ -19,7 +19,6 @@ jobs:
         uses: conda-incubator/setup-miniconda@v3
         with:
           miniforge-version: latest
-          miniforge-variant: Mambaforge
           activate-environment: mslice-env
           environment-file: environment.yml
           auto-activate-base: false
diff --git a/.github/workflows/unit_tests_nightly.yml b/.github/workflows/unit_tests_nightly.yml
index 9d2bee77..ecbbd57d 100644
--- a/.github/workflows/unit_tests_nightly.yml
+++ b/.github/workflows/unit_tests_nightly.yml
@@ -19,7 +19,6 @@ jobs:
         uses: conda-incubator/setup-miniconda@v3
         with:
           miniforge-version: latest
-          miniforge-variant: Mambaforge
           activate-environment: mslice-env
           environment-file: environment.yml
           auto-activate-base: false