diff --git a/Singularity b/Singularity
index 8b893e2ddc462c335c39d29fb40ce511ebe011f8..b287731d4d19e536652db68ade160199d5837bd4 100644
--- a/Singularity
+++ b/Singularity
@@ -1,3 +1,16 @@
 BootStrap: docker
-From: registry-gitlab.pasteur.fr/tru/docker-miniconda3-jupyter:main
+From: continuumio/miniconda3
 
+%post
+# update conda and the OS
+conda update conda && \
+conda upgrade --all -y && \
+apt-get update && \
+DEBIAN_FRONTEND=noninteractive apt-get -y upgrade && \
+DEBIAN_FRONTEND=noninteractive apt-get -y autoremove && \
+DEBIAN_FRONTEND=noninteractive apt-get -y clean autoclean
+
+conda install ipykernel jupyterlab
+# download the yml file
+# curl  https://gitlab.pasteur.fr/tru/conda-container-howto/-/raw/main/pythonnet.yml > pythonnet.yml
+# conda env create --file pythonnet.yml
diff --git a/Singularity_from_docker b/Singularity_from_docker
new file mode 100644
index 0000000000000000000000000000000000000000..8b893e2ddc462c335c39d29fb40ce511ebe011f8
--- /dev/null
+++ b/Singularity_from_docker
@@ -0,0 +1,3 @@
+BootStrap: docker
+From: registry-gitlab.pasteur.fr/tru/docker-miniconda3-jupyter:main
+