let mm10 =
    let mm10_url =
      "ftp://ftp.ensembl.org/pub/release-84/fasta/mus_musculus/dna/Mus_musculus.GRCm38.dna_sm.primary_assembly.fa.gz" in
    let dbsnp_mm10_snps_url =
      "ftp://ftp-mouse.sanger.ac.uk/REL-1303-SNPs_Indels-GRCm38/mgp.v3.snps.rsIDdbSNPv137.vcf.gz" in
    let dbsnp_mm10_indels_url =
      "ftp://ftp-mouse.sanger.ac.uk/REL-1303-SNPs_Indels-GRCm38/mgp.v3.indels.rsIDdbSNPv137.vcf.gz" in
    let gene_annotations_gtf =
      "ftp://ftp.ensembl.org/pub/release-79/gtf/mus_musculus/Mus_musculus.GRCm38.79.gtf.gz" in
    create Name.mm10
      ~metadata:"Provided by the Biokepi Library"
      ~major_contigs:major_contigs_mm10
      ~fasta:Location.(url mm10_url |> gunzip)
      ~dbsnp:Location.(
          vcf_concat ["db_snps.vcf", url dbsnp_mm10_snps_url |> gunzip;
                      "db_indels.vcf", url dbsnp_mm10_indels_url |> gunzip]
        )
      ~exome_gtf:Location.(url gene_annotations_gtf |> gunzip)