diff --git a/modules/local/markdups/main.nf b/modules/local/markdups/main.nf
index 649f85a3..93e791bc 100644
--- a/modules/local/markdups/main.nf
+++ b/modules/local/markdups/main.nf
@@ -2,6 +2,7 @@ process MARKDUPS {
     tag "${meta.id}"
     label 'process_medium'
 
+    conda "${moduleDir}/environment.yml"
     container "${ workflow.containerEngine == 'singularity' && !task.ext.singularity_pull_docker_container ?
         'https://depot.galaxyproject.org/singularity/hmftools-mark-dups:1.1.7--hdfd78af_0' :
         'biocontainers/hmftools-mark-dups:1.1.7--hdfd78af_0' }"