this is the devShell:

        devShells.default = (
          let
            moldDevShell = craneLib.devShell.override {
              # For example, use the mold linker
              mkShell = pkgs.mkShell.override {
                stdenv = pkgs.stdenvAdapters.useMoldLinker pkgs.clangStdenv;
              };
            };
          in
            moldDevShell {
              RUSTC_WRAPPER = "${pkgs.sccache}/bin/sccache";
              CARGO_BUILD_TARGET = "x86_64-unknown-linux-musl";
              CARGO_BUILD_RUSTFLAGS = "-C target-feature=+crt-static -C linker=clang -C link-arg=-fuse-ld=${pkgs.mold}/bin/mold";
              inherit (self.checks.${system}.pre-commit-check) shellHook;

              nativeBuildInputs = with pkgs; [pkg-config clang];

              buildInputs = [
                (rustVersion.override {
                  extensions = ["rust-src" "rust-analyzer" "rustc" "cargo" "clippy"];
                })
                self.checks.${system}.pre-commit-check.enabledPackages
                grpc_health_probe
              ];

              packages = [
                pkgs.upx
                pkgs.coreutils
                pkgs.rust-analyzer
                pkgs.skopeo
                pkgs.protobuf
                pkgs.systemfd
                pkgs.bacon
                pkgs.openssl
                pkgs.skopeo
                pkgs.grpcurl
                pkgs.sccache
              ];
            }
        )