Use ssl-cert-file config

[Hoverbear]

Description

Fixes #516, uses NixOS/nix#8062

Checklist

• Formatted with cargo fmt
• Built with nix build
• Ran flake checks with nix flake check
• Added or updated relevant tests (leave unchecked if not applicable)
• Added or updated relevant documentation (leave unchecked if not applicable)
• Linked to related issues (leave unchecked if not applicable)

Validating with install.determinate.systems

If a maintainer has added the upload to s3 label to this PR, it will become available for installation via install.determinate.systems:

curl --proto '=https' --tlsv1.2 -sSf -L https://install.determinate.systems/nix/pr/$PR_NUMBER | sh -s -- install

[Hoverbear]

I noticed while testing that if I deleted the ssl file before uninstall, that uninstalling could get a bit janky. I want to explore a bit more.

[cole-h]

Could we just ignore a missing file ("if they removed it, less work for us")?

[Hoverbear]

Yeah I worked around the issue I had but I want to make sure there aren't more :)

[Hoverbear]

Ok that works!