nixpkgs-suyu/pkgs/development/beam-modules/hex-registry-snapshot.nix

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{stdenv, writeText, fetchFromGitHub }:
stdenv.mkDerivation rec {
name = "hex-registry";
rev = "e5e494a";
version = "0.0.0+build.${rev}";
src = fetchFromGitHub {
owner = "erlang-nix";
repo = "hex-pm-registry-snapshots";
inherit rev;
sha256 = "0877dragfxs22a05d8mv42z5535kfx9rs4y7fwwbd1ybphczf8za";
};
installPhase = ''
mkdir -p "$out/var/hex"
zcat "registry.ets.gz" > "$out/var/hex/registry.ets"
'';
setupHook = writeText "setupHook.sh" ''
export HEX_REGISTRY_SNAPSHOT="$1/var/hex/registry.ets"
'';
meta = {
platforms = stdenv.lib.platforms.unix;
};
}