nix: rustc versioning, unable to build.

[darshanCommits]

Getting this following the README instructions.

  > :: Building delta dependencies
       > cargo build -r
       > error: rustc 1.82.0 is not supported by the following package:
       >   [email protected] requires rustc 1.83
       >
       > make: *** [Makefile.in:176: builddir/.build-umu-delta] Error 101

I also have a system wide rust install via rustup and rustc is at 1.83

❯ : rustc --version
rustc 1.83.0 (90b35a623 2024-11-26)

[R1kaB3rN]

No idea. The build for both the Debian and Ubuntu .deb package uses rustup and fetches 1.83 tool chain. See https://github.com/Open-Wine-Components/umu-launcher/actions/runs/12659409627/job/35278457335

Moreover, there were at least 2 Nix users that confirmed this project builds fine. And just yesterday, another Nix user made changes to the flake. If there was a problem, they would have caught this.

cc @beh-10257

[beh-10257]

yeah can confirm it builds
using latest nixpkgs and latest commit here
(even if there is a problem I can't help this week)