diff --git a/repo2docker/buildpacks/conda/install-base-env.bash b/repo2docker/buildpacks/conda/install-base-env.bash
index 2182be77..155dc5f1 100755
--- a/repo2docker/buildpacks/conda/install-base-env.bash
+++ b/repo2docker/buildpacks/conda/install-base-env.bash
@@ -23,6 +23,8 @@ chmod 0755 "$MICROMAMBA_EXE"
 
 eval "$(${MICROMAMBA_EXE} shell hook -p ${CONDA_DIR} -s posix)"
 
+eval "$(micromamba shell hook --shell )"
+
 micromamba activate
 
 export PATH="${PWD}/bin:$PATH"