diff --git a/src/glicid_spawner/micromamba.py b/src/glicid_spawner/micromamba.py
index 0f62bb4..1d42063 100644
--- a/src/glicid_spawner/micromamba.py
+++ b/src/glicid_spawner/micromamba.py
@@ -5,9 +5,11 @@ from operator import itemgetter
 from pathlib import Path
 
 MICROMAMBA_ROOT = Path('/micromamba')  # default micromamba root location
-
 GLOBAL_USER = 'operator'
 
+MAMBA_ROOT_PREFIX = f'{MICROMAMBA_ROOT}/{GLOBAL_USER}'
+MAMBA_EXE = f'{MAMBA_ROOT_PREFIX}/bin/micromamba'
+
 
 @dataclass
 class MicromambaEnv:
diff --git a/src/glicid_spawner/spawner.py b/src/glicid_spawner/spawner.py
index 5152f33..93265a4 100644
--- a/src/glicid_spawner/spawner.py
+++ b/src/glicid_spawner/spawner.py
@@ -7,12 +7,38 @@ from batchspawner import JobStatus, SlurmSpawner
 from traitlets import Bool, Integer, Unicode, default
 
 from .form import options_form, options_from_form
+from .micromamba import MAMBA_EXE, MAMBA_ROOT_PREFIX
 from .progress import ElapseTime, get_progress
 
 
 class GlicidSpawner(SlurmSpawner):
     """Glicid SLURM Spawner."""
 
+    batchspawner_singleuser_cmd = Unicode(
+        'glicid-spawner-singleuser',
+        help='Spawner singleuser command.',
+    ).tag(config=True)
+
+    req_mamba_root_prefix = Unicode(
+        MAMBA_ROOT_PREFIX,
+        help='Micromamba global root prefix',
+    ).tag(config=True)
+
+    req_mamba_exe = Unicode(
+        MAMBA_EXE,
+        help='Micromamba global exe',
+    ).tag(config=True)
+
+    req_job_name = Unicode(
+        'jupyterhub_glicid',
+        help='SLURM job name',
+    ).tag(config=True)
+
+    req_qos = Unicode(
+        'short',
+        help='QoS name to submit job to resource manager',
+    ).tag(config=True)
+
     batch_script = Unicode(
         """#!/bin/bash
 #SBATCH --job-name={{job_name}}
@@ -47,8 +73,8 @@ export JUPYTER_JOB_LOG=${JUPYTER_LOG_DIR}/$(date "+%Y-%m-%d")_{{job_name}}_${SLU
     scontrol write batch_script ${SLURM_JOB_ID} -;
 
     {# Micromamba config #}
-    export MAMBA_ROOT_PREFIX=/micromamba/operator;
-    export MAMBA_EXE=$MAMBA_ROOT_PREFIX/bin/micromamba;
+    export MAMBA_EXE={{mamba_exe}};
+    export MAMBA_ROOT_PREFIX={{mamba_root_prefix}};
     source $MAMBA_ROOT_PREFIX/etc/profile.d/micromamba.sh;
 
     {# Activate micromamba env requested by the user #}
@@ -87,21 +113,6 @@ export JUPYTER_JOB_LOG=${JUPYTER_LOG_DIR}/$(date "+%Y-%m-%d")_{{job_name}}_${SLU
         """The URL the single-user server should start in."""
         return '/lab/tree' + self.user_options.get('workdir', '/home/{username}') + '?reset'
 
-    batchspawner_singleuser_cmd = Unicode(
-        'glicid-spawner-singleuser',
-        help='Spawner singleuser command.',
-    ).tag(config=True)
-
-    req_job_name = Unicode(
-        'jupyterhub_glicid',
-        help='SLURM job name',
-    ).tag(config=True)
-
-    req_qos = Unicode(
-        'short',
-        help='QoS name to submit job to resource manager',
-    ).tag(config=True)
-
     slurm_job_id_re = Unicode(r'(\d+)(?:;(\w+))?').tag(config=True)
 
     def parse_job_id(self, output):
diff --git a/tests/test_spawner.py b/tests/test_spawner.py
index a6e4f01..2eb88e0 100644
--- a/tests/test_spawner.py
+++ b/tests/test_spawner.py
@@ -22,11 +22,14 @@ def test_spawner_config():
 
     assert spawner.batchspawner_singleuser_cmd == 'glicid-spawner-singleuser'
 
+    assert spawner.req_mamba_root_prefix == '/micromamba/operator'
+    assert spawner.req_mamba_exe == '/micromamba/operator/bin/micromamba'
+    assert spawner.req_job_name == 'jupyterhub_glicid'
+    assert spawner.req_qos == 'short'
+
     assert spawner.disable_user_config
     assert spawner.notebook_dir == '/'
     assert spawner.default_url == '/lab/tree/home/{username}?reset'
-    assert spawner.req_job_name == 'jupyterhub_glicid'
-    assert spawner.req_qos == 'short'
     assert spawner.progress_rate == 10
 
 
@@ -56,6 +59,8 @@ def test_spawner_batch_script(monkeypatch):
 
     assert 'export JUPYTER_LOG_DIR="/home/john-doe/.jupyter/spawner/logs"' in script
 
+    assert 'export MAMBA_EXE=/micromamba/operator/bin/micromamba;' in script
+    assert 'export MAMBA_ROOT_PREFIX=/micromamba/operator;' in script
     assert 'micromamba activate /micromamba/john-doe/envs/foo;' in script