os.mkdir("/usr/local/share/bcbio-nextgen/galaxy/tool-data")
-with open("/usr/local/share/bcbio-nextgen/galaxy/tool-data/tool_data_table_conf.xml") as f:
+with open("/usr/local/share/bcbio-nextgen/galaxy/tool-data/tool_data_table_conf.xml", "w") as f:
f.write('''<tables>
<!-- Locations of indexes in the BWA mapper format -->
<table name="bwa_indexes" comment_char="#">