Steps to reproduce

Create an environment like this:

spack:
  view: true
  concretization: together
  specs:
  - clingo@spack
  - py-ipython
  - py-boto3
  - py-sphinx@4.0:4.1.1
  - py-sphinxcontrib-programoutput
  - py-sphinx-rtd-theme
  - py-python-levenshtein

and run spack install. The view takes more than 10 seconds to create.

When adding a new spec, and rerunning spack install, it takes as much time.

Also somehow I'm ending up with a bunch of files of the form [name]~ in my path, like pybabel~.

@adamjstewart is reporting the same. ping @becker33

Error message

none

Information on your system

• Spack: 0.16.2-3990-e41596c718
• Python: 3.8.11
• Platform: linux-ubuntu20.04-zen2
• Concretizer: clingo

General information

• I have run spack debug report and reported the version of Spack/Python/Platform
• I have searched the issues of this repo and believe this is not a duplicate
• I have run the failing commands in debug mode and reported the output