repro-env 0.4.4

Dependency lockfiles for reproducible build environments 📦🔒
Documentation 
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{
  inputs = {
    fenix.url = "github:nix-community/fenix";
    flake-utils.url = "github:numtide/flake-utils";
    naersk.url = "github:nix-community/naersk";
    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
  };

  outputs = { self, fenix, flake-utils, naersk, nixpkgs }:
    flake-utils.lib.eachDefaultSystem (
      system: let
        pkgs = (import nixpkgs) {
          inherit system;
        };

        toolchain = with fenix.packages.${system};
          combine [
            stable.rustc
            stable.cargo
            targets.x86_64-unknown-linux-musl.stable.rust-std
          ];

        naersk' = naersk.lib.${system}.override {
          cargo = toolchain;
          rustc = toolchain;
        };

      in rec {
        defaultPackage = naersk'.buildPackage {
          src = ./.;
          nativeBuildInputs = with pkgs; [ pkgsStatic.stdenv.cc ];
          CARGO_BUILD_TARGET = "x86_64-unknown-linux-musl";
          CARGO_BUILD_RUSTFLAGS = "-C target-feature=+crt-static -C strip=symbols";
          CC_x86_64-unknown-linux-musl = "${pkgs.musl.dev}/bin/musl-gcc";
        };
      }
    );
}