fix: $nt

tasks/DownSample.wdl

@@ -13,9 +13,9 @@ task DownSample {
     set -e
     nt=$(nproc)
     if [ ${p} ]; then
-      seqkit sample --two-pass --threads ${nt} -s 100 -p ${p} ${fastq} -o ${sample_id}.fastq.gz
+      seqkit sample --two-pass --threads $nt -s 100 -p ${p} ${fastq} -o ${sample_id}.fastq.gz
     else
-      seqkit sample --two-pass --threads ${nt} -s 100 -n ${n} ${fastq} -o ${sample_id}.fastq.gz
+      seqkit sample --two-pass --threads $nt -s 100 -n ${n} ${fastq} -o ${sample_id}.fastq.gz
     fi
   >>>