diff --git a/config/softwares.config b/config/softwares.config
index 1dfb71c..b01edd1 100644
--- a/config/softwares.config
+++ b/config/softwares.config
@@ -25,7 +25,7 @@ process {
     }
     withLabel: "jacusa2" {
         container = singularity.enabled ? "${params.sifPath}/jacusa2.sif" : "jacusa2"
-        containerOptions = '--ulimit nofile=1024:1024'    // Limit number of file descriptors to avoid out of memory errors
+        containerOptions = singularity.enabled ? "" : '--ulimit nofile=1024:1024'    // Limit number of file descriptors to avoid out of memory errors
     }
     withLabel: 'minimap2' {
         container = 'quay.io/biocontainers/minimap2:2.26--he4a0461_1'