?ref behavior for flakes seems to be broken on Lix 2.95.2:

quadradical@quadraticpc ~/D/C/q/qhelpdesk (main) [1]> nix build git+https://forgejo.ellis.link/Henry-Hiles/continuwuity?ref=quad/fix/musl-static-builds
warning: could not update mtime for file '': No such file or directory
fetching Git repository 'https://forgejo.ellis.link/Henry-Hiles/continuwuity'fatal: ambiguous argument 'quad/fix/musl-static-builds': unknown revision or path not in the working tree.
Use '--' to separate paths from revisions, like this:
'git <command> [<revision>...] -- [<file>...]'
error:
       … while fetching the input 'git+https://forgejo.ellis.link/Henry-Hiles/continuwuity?ref=quad/fix/musl-static-builds'

       error: program 'git' failed with exit code 128

Like this?

quadradical@quadraticpc ~/D/C/continuwuity (quad/feat/musl-static-builds)> nix build git+https://forgejo.ellis.link/Henry-Hiles/continuwuity?ref=refs/heads/quad/fix/musl-static-builds#default-static-x86_64
fatal: couldn't find remote ref refs/heads/quad/fix/musl-static-builds
error:
       … while fetching the input 'git+https://forgejo.ellis.link/Henry-Hiles/continuwuity?ref=refs/heads/quad/fix/musl-static-builds'

       error: program 'git' failed with exit code 128

In the series of odd things, or misunderstandings, if I run

1. ‘nix run .#all-dependencies’ a transitive dependency needing GCC can’t find cc, but when running
2. ‘nix-shell -p vibe” (to try out new tooling for fun) and then the same ‘nix run .#all-tests’ the cargo now finds the cc and my openssl-sys compiles.

Any clues what might be going on? The gist is that I had been inside the second case for way too long and had broken my builds in some obscure way in the middle but no idea where. Running lix 2.92.2.