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    my $sha1 = $self->notes('zmq-sha1');
    my $archive = "zeromq-$version.tar.gz";

    print "Downloading libzmq $version source archive from download.zeromq.org...\n";
    getstore("http://download.zeromq.org/$archive", $archive) == RC_OK
        or die "Failed to download libzmq source archive";

    print "Verifying...\n";
    my $sha1sum = Digest::SHA->new;
    open my $ARCHIVE, '<', $archive or die "Can't open source archive";
    binmode $ARCHIVE;
    $sha1sum->addfile($ARCHIVE);
    close $ARCHIVE;
    $sha1sum->hexdigest eq $sha1 or die "Source archive checksum mismatch";

    print "Extracting...\n";
    Archive::Tar->new($archive)->extract;
    unlink $archive;

    my $prefix  = catdir($self->install_destination("lib"), qw/auto share dist Alien-ZMQ/);
    my $basedir = $self->base_dir;