apt --no-strict-pinning --solver 3.0 satisfy 'apt (<< 2.9)'

vv221, 19 days ago

What is --no-strict-pinning doing in this example?

juliank, 19 days ago

@vv221 (Some) external solvers supported this for a while using -o APT::Solver::Strict-Pinning=0, but I added an option now.

https://salsa.debian.org/apt-team/apt/-/merge_requests/347

Normally APT only has a single candidate version for a given package. i.e. APT 2.9.2, so if you want to install an older APT it would fail, because e.g. apt-utils 2.9.2 Depends apt=2.9.2, or it would remove apt-utils rather than change it to a non-candidate version.