diff --git a/bob/devtools/data/gitlab-ci/noarch.yaml b/bob/devtools/data/gitlab-ci/noarch.yaml
index 634324c93f05368b6f4decdb320e97f67c4823b2..8d29a69c1f75d84102be29adb3f6a693064e81cf 100644
--- a/bob/devtools/data/gitlab-ci/noarch.yaml
+++ b/bob/devtools/data/gitlab-ci/noarch.yaml
@@ -26,7 +26,7 @@ stages:
     - python3 bootstrap.py -vv channel base
     - source ${CONDA_ROOT}/etc/profile.d/conda.sh
     # for conda inspect during builds (on macos)
-    - conda install -n base conda-build
+    - mamba install -n base conda-build
     - conda activate base
     - bdt ci check -vv
   cache:
diff --git a/bob/devtools/data/gitlab-ci/single-package.yaml b/bob/devtools/data/gitlab-ci/single-package.yaml
index 94377a6fa2cf034c3e6c2552357017ab2e9f06d2..aebf064d238a57ee58fe847085bdb375ad4d7ff6 100644
--- a/bob/devtools/data/gitlab-ci/single-package.yaml
+++ b/bob/devtools/data/gitlab-ci/single-package.yaml
@@ -26,7 +26,7 @@ stages:
     - python3 bootstrap.py -vv channel base
     - source ${CONDA_ROOT}/etc/profile.d/conda.sh
     # for conda inspect during builds (on macos)
-    - conda install -n base conda-build
+    - mamba install -n base conda-build
     - conda activate base
     - bdt ci check -vv
   cache: