Cargo.lock parsing fails for cargo <1.83

[eureka-cpu]

Describe the bug

Ref #172
Using nixpkgs where cargo is <1.83 causes Cargo.lock parsing to fail.

[eureka-cpu]

Here's the error output btw:

$ nix build --override-input nixpkgs https://github.com/NixOS/nixpkgs/archive/nixos-24.05.tar.gz
warning: Git tree '/home/eureka/Code/numtide/system-manager' is dirty
warning: not writing modified lock file of flake 'git+file:///home/eureka/Code/numtide/system-manager':
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/3566ab7246670a43abd2ffa913cc62dad9cdf7d5?narHash=sha256-AKU6qqskl0yf2%2BJdRdD0cfxX4b9x3KKV5RqA6wijmPM%3D' (2024-12-13)
  → 'https://github.com/NixOS/nixpkgs/archive/nixos-24.05.tar.gz?narHash=sha256-ze3IJksru9dN0keqUxY0WNf8xrwfs8Ty/z9v/keyBbg%3D' (2024-12-18)
error: builder for '/nix/store/6jzi9ha0l7rq0b514cca2qsg16lbfs7d-system-manager-0.1.0.drv' failed with exit code 101;
       last 18 log lines:
       > Running phase: unpackPhase
       > unpacking source archive /nix/store/ykp7akkrv4x7yx25kpns612wh0drscng-source
       > source root is source
       > Executing cargoSetupPostUnpackHook
       > Finished cargoSetupPostUnpackHook
       > Running phase: patchPhase
       > Executing cargoSetupPostPatchHook
       > Validating consistency between /build/source/Cargo.lock and /build/cargo-vendor-dir/Cargo.lock
       > Finished cargoSetupPostPatchHook
       > Running phase: updateAutotoolsGnuConfigScriptsPhase
       > Running phase: configurePhase
       > Running phase: buildPhase
       > Executing cargoBuildHook
       > ++ env CC_X86_64_UNKNOWN_LINUX_GNU=/nix/store/i53w7x986ifmgzvb8da6zkfms4xzmdrk-gcc-wrapper-13.2.0/bin/cc CXX_X86_64_UNKNOWN_LINUX_GNU=/nix/store/i53w7x986ifmgzvb8da6zkfms4xzmdrk-gcc-wrapper-13.2.0/bin/c++ CARGO_TARGET_X86_64_UNKNOWN_LINUX_GNU_LINKER=/nix/store/i53w7x986ifmgzvb8da6zkfms4xzmdrk-gcc-wrapper-13.2.0/bin/cc CC_X86_64_UNKNOWN_LINUX_GNU=/nix/store/i53w7x986ifmgzvb8da6zkfms4xzmdrk-gcc-wrapper-13.2.0/bin/cc CXX_X86_64_UNKNOWN_LINUX_GNU=/nix/store/i53w7x986ifmgzvb8da6zkfms4xzmdrk-gcc-wrapper-13.2.0/bin/c++ CARGO_TARGET_X86_64_UNKNOWN_LINUX_GNU_LINKER=/nix/store/i53w7x986ifmgzvb8da6zkfms4xzmdrk-gcc-wrapper-13.2.0/bin/cc CARGO_BUILD_TARGET=x86_64-unknown-linux-gnu HOST_CC=/nix/store/i53w7x986ifmgzvb8da6zkfms4xzmdrk-gcc-wrapper-13.2.0/bin/cc HOST_CXX=/nix/store/i53w7x986ifmgzvb8da6zkfms4xzmdrk-gcc-wrapper-13.2.0/bin/c++ cargo build -j 20 --target x86_64-unknown-linux-gnu --frozen --profile release
       > error: failed to parse lock file at: /build/source/Cargo.lock
       >
       > Caused by:
       >   lock file version 4 requires `-Znext-lockfile-bump`

[eureka-cpu]

Agh.. -Znext-lockfile-bump requires the nightly rust toolchain otherwise maybe this would have worked:

# Cargo.lock parsing standard was updated from 3 to 4 in version 1.83: https://github.com/rust-lang/cargo/blob/652623b779c88fe44afede28bf7f1c9c07812511/CHANGELOG.md#changed-2
cargoBuildFlags = if (builtins.compareVersions rustPlatform.rust.cargo.version "1.83") == -1 then ["-Znext-lockfile-bump"] else [];

Maybe it would be better to just cut releases and make the requirements more clear as to what version of cargo/nixpkgs is required?