Better concretizer error message: Cannot satisfy requirement group for package

[adamjstewart]

Summary

Okay, this one was my own dumb fault. I added a packages.yaml along the lines of:

packages:
  foo:
    require: "@1.2.3"

then later forgot about this and tried to install a newer version:

$ spack install foo@2.3.4
...
==> Error: Cannot satisfy requirement group for package 'foo'

I'm wondering if we can somehow improve this message to clarify that:

1. I, the user, expressly forbid this in packages.yaml
2. Specifically, ~/.spack/packages.yaml
3. And if I want to allow this, I need to delete this specific section of packages.yaml

Rationale

No response

Description

No response

Additional information

No response

General information

• I have run spack --version and reported the version of Spack
• I have searched the issues of this repo and believe this is not a duplicate