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Delete existing Spack for fresh installation

Export variable

You can just remove the existing $SPACK_ROOT and install a new Spack environment. For example, if $SPACK_ROOT is /shared/spack, you can do:

export SPACK_ROOT=/shared/spack

Remove spack from the system

rm -rf $SPACK_ROOT

Download Spack

Now, you can download Spack and go through the steps of Spack Installation again.

export SPACK_ROOT=/shared/spack
mkdir -p $SPACK_ROOT
git clone -b v0.18.0 -c feature.manyFiles=true https://github.com/spack/spack $SPACK_ROOT