- Move-site-config-scope-before-system-scope.patch:
  Give 'site' scope a lower precedence than 'system' scope.
  The 'site wide' config scope was meant to be per Spack
  installation. A single system may have multiple Spack
  installations, so was is meant for overriding the
  'system' wide setting per installation.
  The Spack package is OS-vendor provided. The vendor provides
  pr generates a configuration which a local admin may want to
  override. This can now be done from within the 'system' scope.
  Previously the vendor-supplied configuration was mixed with
  the 'system' scope - local modifications collided with
  vendor autoconfiguration.
- Add a build-dependency package which will cause build tools
  and libraries used frequently by Spack to be installed.
  All these packages are recommended by the main Spack package
  already. This package may be used in environments where the
  installation of recommended packages is disabled by default.

- Update Spack to version 0.22.0
  * New features:
    - Compiler dependencies:
      Spack is in the process of making compilers proper dependencies.
      For this, compiler dependencies are moving from `compilers.yaml`
      to `packages.yaml` to make this consistent with other externals.
      For this, dependency graphs will not show the compiler runtime
      libraries like `gcc-runtime` or `libgfortran`.
      To minimize disruption, an existing `compilers.yaml` file will
      continue to work, however, users are encourage to migrate
      before v0.23.
      + Packages compiled with `%gcc` now depend on a new package

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