Julia in nixpkgs: managed to handle external dependency on Darwin

eliminate-homebrew-dependency.nix

#!/usr/bin/env nix-shell --pure

with import <nixpkgs> {};
let
  d = version: "v${lib.concatStringsSep "." (lib.take 2 (lib.splitString "." version))}";
  extraLibs = [ mbedtls zlib zeromq3 ];
in
stdenv.mkDerivation rec {
  name = "julia-${version}-env";
  version = julia.version;
  nativeBuildInputs = [ makeWrapper cacert git pkgconfig which ];
  buildInputs = [
    julia
    jupyterEnv  # my custom jupyter
  ] ++ extraLibs;
  phases = [ "installPhase" ];
  installPhase = ''
    export SSL_CERT_FILE=${cacert}/etc/ssl/certs/ca-bundle.crt
    export JULIA_PKGDIR=/var/cache/julia
    export LD_LIBRARY_PATH=${lib.makeLibraryPath extraLibs}
    if [ ! -d $JULIA_PKGDIR/${d version}/METADATA ]; then
        julia -e "Pkg.init()"
    # else
    #     julia -e "Pkg.update()"
    fi
    pushd $JULIA_PKGDIR/${d version}

    # Install ZMQ.jl manually to remove dependnecy to Hombrew.jl
    [ -d ZMQ ] || git clone https://github.com/JuliaInterop/ZMQ.jl.git ZMQ
    pushd ZMQ
    sed -i 's#.*Homebrew.*##g' REQUIRE
    sed -i 's#.*Homebrew.*##g' deps/build.jl
    julia -e "Pkg.resolve(); Pkg.build(\"ZMQ\")"
    popd

    # Install MbedTLS.jl manually to remove dependnecy to Homebrew.jl
    [ -d MbedTLS ] || git clone https://github.com/JuliaWeb/MbedTLS.jl.git MbedTLS
    pushd MbedTLS
    sed -i 's#.*Homebrew.*##g' REQUIRE
    sed -i 's#.*Homebrew.*##g' deps/build.jl
    julia -e "Pkg.resolve(); Pkg.build(\"MbedTLS\")"
    popd

    julia -e "Pkg.add(\"IJulia\")"
    # export JUPYTER=${jupyterEnv}/bin/jupyter
    # export HOME=...
    # julia -e "Pkg.build(\"IJulia\")"  # install the kernelspec

    popd
    makeWrapper ${julia}/bin/julia $out/bin/julia \
        --prefix LD_LIBRARY_PATH : "$LD_LIBRARY_PATH" \
        --set JULIA_PKGDIR $JULIA_PKGDIR
        # --set JULIA_LOAD_PATH $JULIA_PKGDIR/${d version}
  '';
}