>>> Emerging : portage://sci-libs/xdmf2-1.0_p141226-r5:run?{[]}

These are the packages that would be merged, in order:

Calculating dependencies... done!

 └─step  1─┤ useflag portage://sci-libs/hdf5-2.2.0 (-hl)

 └─step  2─┤ download  portage://dev-build/b2-5.5.3
             │           └─ file ─┤ 1.17 Mb  	 b2-5.5.3.tar.gz
             │ download  portage://dev-libs/boost-1.91.0-r2
             │           └─ file ─┤ 195.10 Mb  	 boost_1_91_0.tar.bz2
             │ download  portage://sci-libs/hdf5-2.2.0
             │           └─ file ─┤ 40.18 Mb  	 hdf5-2.2.0.tar.gz
             │ download  portage://sci-libs/xdmf2-1.0_p141226-r5
             │           └─ file ─┤ 260.84 Kb  	 xdmf2-1.0_p141226.tar.xz

Total: 5 actions (1 useflag, 4 downloads), grouped into 2 steps.
       236.71 Mb to be downloaded.


>>> Assumptions taken during proving & planning:

  USE flag change (1 package):
  Add to /etc/portage/package.use:
    sci-libs/hdf5 -hl