let b37decoy =
    create Name.b37decoy
      ~metadata:"Provided by the Biokepi library"
      ~major_contigs:major_contigs_b37
      ~fasta:Location.(
          url
            "ftp://ftp.1000genomes.ebi.ac.uk/vol1/ftp/technical/reference/phase2_reference_assembly_sequence/hs37d5.fa.gz"
          |> gunzip)
      ~dbsnp:Location.(url b37_dbsnp_url |> gunzip)
      ~exome_gtf:Location.(url b37_exome_gtf_url |> gunzip)
      ~cosmic:Location.(url b37_cosmic_url)
      ~cdna:Location.(url b37_cdna_url |> gunzip)