nix develop: error: package clap v4.1.1 cannot be built because it requires rustc 1.64.0 or newer, while the currently active rustc version is 1.63.0

[bbigras]

• git clone
• nix develop

error: builder for '/nix/store/nnc2qv6d9by2xkm929brcy3mn3xzr61j-cargo-pgx-deps-0.7.0-beta.1.drv' failed with exit code 101;
       last 10 log lines:
       > [naersk] cargo_bins_jq_filter: .
       > [naersk] cargo_build_output_json (created): /build/tmp.elsNfg2ijv
       > [naersk] crate_sources: /nix/store/7jx00c6y13jzv4hnkq36mh69c8pn7gxr-dependencies
       > [naersk] RUSTFLAGS:
       > [naersk] CARGO_BUILD_RUSTFLAGS:
       > [naersk] CARGO_BUILD_RUSTFLAGS (updated): --remap-path-prefix /nix/store/7jx00c6y13jzv4hnkq36mh69c8pn7gxr-dependencies=/sources
       > building
       > cargo build $cargo_release -j "$NIX_BUILD_CORES" --message-format=$cargo_message_format --package cargo-pgx
       > error: package `clap v4.1.1` cannot be built because it requires rustc 1.64.0 or newer, while the currently active rustc version is 1.63.0
       > [naersk] cargo returned with exit code 101, exiting
       For full logs, run 'nix log /nix/store/nnc2qv6d9by2xkm929brcy3mn3xzr61j-cargo-pgx-deps-0.7.0-beta.1.drv'.
error: 1 dependencies of derivation '/nix/store/9f31d22czpilcghaps5il52r44yvm7ij-cargo-pgx-0.7.0-beta.1.drv' failed to build
error: 1 dependencies of derivation '/nix/store/xy0yznf7wrgy53i0gym32q74fyl1wwy9-nix-shell-env.drv' failed to build

[eeeebbbbrrrr]

Do you think this is something you could fix up for us with a PR? We're still jacked into the Matrix learning nix-fu...

[workingjubilee]

Actually, what we really need is a better explanation of why the currently active rustc version is 1.63.0 for you, because I reviewed the sources of our nix files and we don't, as far as I am aware, pin against that rustc version.

[bbigras]

we don't, as far as I am aware, pin against that rustc version.

Shouldn't the rust version of the nixpkgs in your flake.lock be used?

EDIT:

❯ nix run github:nixos/nixpkgs/93a0067a9c85c17764f7755947e6ecf52dc47d8a#rustc -- --version
rustc 1.63.0

[workingjubilee]

Ah yeah.
Probably should nuke the flake.lock if it's gonna be like that.

[bbigras]

Having a flake.lock file is kinda nice, though. If it's the right version, I can assume that it will work anywhere.

[workingjubilee]

Fair enough.