add nkmcu

hc

2023-11-06 170c1c0fa90ad9f762d1877f8a57efce706fc95a

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# Locally computed:
sha256 d3be5c6eec24950cb3bd67dbfbcdf036f1278fae5fd78655ef8cdf9e911e428a dmalloc-5.5.2.tgz