- pkgname: a
  version: '1'
  requires:
  - b=1
  provides:
  - a = 1
  - a(x86_64) = 1
- pkgname: a
  version: '2'
  requires:
  - b=2
  provides:
  - a = 2
  - a(x86_64) = 2
- pkgname: b
  version: '1'
  provides:
  - b = 1
  - b(x86_64) = 1
- pkgname: b
  version: '2'
  provides:
  - b = 2
  - b(x86_64) = 2