Julia in Nix

flake.nix

{
  description = "a nix flake for compiling julia programs";
  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
    flake-utils.url = "github:numtide/flake-utils";
  };
  outputs = { self, nixpkgs, flake-utils, ... }:
  flake-utils.lib.eachDefaultSystem (system:
    let pkgs = nixpkgs.legacyPackages.${system};
    in rec {
      packages = {
        juliaSkele = (import ./juliaDeri.nix) { pkgs = pkgs; pname = "myjulia"; };
      };
      defaultPackage = packages.juliaSkele;
    }
  );
}

juliaDeri.nix

{ pkgs,
  pname,
  exampleFile ? "src/Example.jl",
  mainFile ? "src/Main.jl",
  ... }: 
pkgs.stdenv.mkDerivation rec {
    name = pname;
    src = ./.;

    buildInputs = with pkgs; [ julia curl ];

    phases = [ "configurePhase" "buildPhase" "installPhase" ];

    configurePhase = ''
      julia --project --trace-compile=precompile.jl -q ${src}/${exampleFile};
    '';

    buildPhase = ''
      unset packageList;
      unset finalList;
      unset prepedColon;

      packageList=$(julia --project -E 'using Pkg; Pkg.status(mode=PKGMODE_MANIFEST)' | sed 1,2d | head -n -1 | sed 's/.*\]\ //g' | sed 's/\ .*//g')
      prependColon=$(for p in $packageList; do echo ":"''${p}", "; done)
      finalList="["''${prependColon::-2}"]"

      julia --project -q -E \
        using Pkg \
        Pkg.add("https://github.com/JuliaLang/PackageCompiler.jl" rev="v1.2.3") \
        Pkg.instantiate \
        Pkg.activate \
        using PackageCompiler \
        create_sysimage(''${finalList}, sysimage_path="generatedSysImage.so", precompile_execution_file="$out/precompile.jl")
    '';

    installPhase = ''
      rm $out/precompile.jl
      mkdir -p $out/bin
      cp -r * $out
      echo "JULIA_LOAD_PATH=$out julia --project --sysimage ../generatedSysImage.so $out/${mainFile}" >> $out/bin/${pname}
      chmod +x $out/bin/${pname}
    '';
}