diff --git a/conf/uppmax.config b/conf/uppmax.config
index 3b518d4..df35835 100644
--- a/conf/uppmax.config
+++ b/conf/uppmax.config
@@ -10,11 +10,14 @@ params {
 
 singularity {
   enabled = true
+  envWhitelist = 'SNIC_TMP'
 }
 
 process {
   executor = 'slurm'
   clusterOptions = { "-A $params.project ${params.clusterOptions ?: ''}" }
+  // Use node local storage for execution.
+  scratch = '$SNIC_TMP'
 }
 
 params {