fix up Saravan's petsc install
fix up Saravan's petsc install

skosukhin/spack,EmreAtes/spack,EmreAtes/spack,skosukhin/spack,tmerrick1/spack,LLNL/spack,LLNL/spack,mfherbst/spack,LLNL/spack,TheTimmy/spack,matthiasdiener/spack,krafczyk/spack,TheTimmy/spack,iulian787/spack,TheTimmy/spack,krafczyk/spack,skosukhin/spack,matthiasdiener/spack,skosukhin/spack,iulian787/spack,krafczyk/spack,skosukhin/spack,tmerrick1/spack,TheTimmy/spack,LLNL/spack,mfherbst/spack,iulian787/spack,lgarren/spack,lgarren/spack,TheTimmy/spack,matthiasdiener/spack,lgarren/spack,lgarren/spack,mfherbst/spack,tmerrick1/spack,EmreAtes/spack,LLNL/spack,matthiasdiener/spack,EmreAtes/spack,krafczyk/spack,lgarren/spack,tmerrick1/spack,tmerrick1/spack,mfherbst/spack,iulian787/spack,EmreAtes/spack,iulian787/spack,krafczyk/spack,mfherbst/spack,matthiasdiener/spack