diff --git a/bob/devtools/data/gitlab-ci/base-build.yaml b/bob/devtools/data/gitlab-ci/base-build.yaml
index 663471c37a9e2a11b1286d3bcb591a1a5b96f137..f77159e1588b1491b7c097362494fb8e1da04785 100644
--- a/bob/devtools/data/gitlab-ci/base-build.yaml
+++ b/bob/devtools/data/gitlab-ci/base-build.yaml
@@ -22,6 +22,7 @@ stages:
     - python3 bootstrap.py -vv channel base
     - source ${CONDA_ROOT}/etc/profile.d/conda.sh
     - conda activate base
+    - conda clean --all
     - bdt ci base-build -vv nopython.txt
     - bdt ci base-build -vv python.txt
     - '[ "${CI_COMMIT_REF_NAME}" = "master" ] && bdt ci base-deploy -vv'
diff --git a/bob/devtools/data/gitlab-ci/docs.yaml b/bob/devtools/data/gitlab-ci/docs.yaml
index d1d7f9d05699c748850f49f06ec27d4626529e53..6983cedce439634a7fa15ac23e809bb8fbd12df2 100644
--- a/bob/devtools/data/gitlab-ci/docs.yaml
+++ b/bob/devtools/data/gitlab-ci/docs.yaml
@@ -27,6 +27,7 @@ stages:
     - python3 bootstrap.py -vv channel base
     - source ${CONDA_ROOT}/etc/profile.d/conda.sh
     - conda activate base
+    - conda clean --all
   cache:
     paths:
       - torch
diff --git a/bob/devtools/data/gitlab-ci/nightlies.yaml b/bob/devtools/data/gitlab-ci/nightlies.yaml
index 92ca0c3e8a56b65d139a7c50d16e8a49e63a20a1..5a249e12f6c7f0ebc8d44d43f54202b975840e8b 100644
--- a/bob/devtools/data/gitlab-ci/nightlies.yaml
+++ b/bob/devtools/data/gitlab-ci/nightlies.yaml
@@ -24,6 +24,7 @@ stages:
     - python3 bootstrap.py -vv channel base
     - source ${CONDA_ROOT}/etc/profile.d/conda.sh
     - conda activate base
+    - conda clean --all
   cache:
     paths:
       - miniconda.sh