With the current ET trunk, I get the following error on a clean build on Datura:
Running configuration script for thorn HDF5: Additional requested language support: Fortran ERROR: ERROR in HDF5 configuration: ERROR: H5pubconf.h not found in
The build then hangs at that point with no further output. This may be related to the recent changes to the HDF5 thorn to factor out common code in external libraries. The error message is one issue, the hanging build is another I think.