HUMann2 and MetaPhlAn2

HUMAnN wont run because it cant find MetaPhlAn2.
MetaPhlAn2 wont install because it says this:
LibMambaUnsatisfiableError: Encountered problems while solving:

  • nothing provides blast >=2.6.0 needed by metaphlan-2.8.1-py_0

Could not solve for environment specs
The following package could not be installed
└─ metaphlan is not installable because it requires
└─ blast >=2.6.0 , which does not exist (perhaps a missing channel).
I am not sure what to do next. If I try and find this blast version 2.6 do I install it and where or what?