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  <xs:element id="nxtt_SellingAndMarketingExpense1Member" name="SellingAndMarketingExpense1Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="nxtt_GeneralAndAdministrativeExpense1Member" name="GeneralAndAdministrativeExpense1Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="nxtt_GeneralAndAdministrativeExpenses1Member" name="GeneralAndAdministrativeExpenses1Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="nxtt_ShareBasedCompensationExpenseScheduleofShareBasedCompensationExpensesDetailsTable" name="ShareBasedCompensationExpenseScheduleofShareBasedCompensationExpensesDetailsTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="nxtt_ScheduleOfServiceBasedShareAwardsAbstract" name="ScheduleOfServiceBasedShareAwardsAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xs:element id="nxtt_RecentlyAdoptedAccountingStandardUpdatesPolicyTextBlock" name="RecentlyAdoptedAccountingStandardUpdatesPolicyTextBlock" type="dtr:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="nxtt_CryptoAssetRollForwardTableTextBlock" name="CryptoAssetRollForwardTableTextBlock" type="dtr:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="nxtt_SellingAndMarketingExpensesPolicyTextBlock" name="SellingAndMarketingExpensesPolicyTextBlock" type="dtr:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="nxtt_CapitalStructurePolicyTextBlock" name="CapitalStructurePolicyTextBlock" type="dtr:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="nxtt_EmergingGrowthCompanyPolicyTextBlock" name="EmergingGrowthCompanyPolicyTextBlock" type="dtr:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xs:element id="nxtt_ExerciseOfPrefundWarrant" name="ExerciseOfPrefundWarrant" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xs:element id="nxtt_ReverseStockSplitSharesReduced" name="ReverseStockSplitSharesReduced" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
</xs:schema>
