handle explicit when requesting to install already installed packages
handle explicit when requesting to install already installed packages

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