1 files changed, 40 insertions, 0 deletions
diff --git a/nixpkgs/pkgs/development/beam-modules/fetch-mix-deps.nix b/nixpkgs/pkgs/development/beam-modules/fetch-mix-deps.nix
new file mode 100644
index 000000000000..020a82ad70b7
--- /dev/null
+++ b/nixpkgs/pkgs/development/beam-modules/fetch-mix-deps.nix
@@ -0,0 +1,40 @@
+{ stdenvNoCC, lib, elixir, hex, rebar, rebar3, cacert, git }:
+
+{ name, version, sha256, src, mixEnv ? "prod", debug ? false, meta ? { } }:
+
+stdenvNoCC.mkDerivation ({
+  name = "mix-deps-${name}-${version}";
+
+  nativeBuildInputs = [ elixir hex cacert git ];
+
+  inherit src;
+
+  MIX_ENV = mixEnv;
+  MIX_DEBUG = if debug then 1 else 0;
+  DEBUG = if debug then 1 else 0; # for rebar3
+
+  configurePhase = ''
+    export HEX_HOME="$TEMPDIR/.hex";
+    export MIX_HOME="$TEMPDIR/.mix";
+    export MIX_DEPS_PATH="$out";
+
+    # Rebar
+    mix local.rebar rebar "${rebar}/bin/rebar"
+    mix local.rebar rebar3 "${rebar3}/bin/rebar3"
+    export REBAR_GLOBAL_CONFIG_DIR="$TMPDIR/rebar3"
+    export REBAR_CACHE_DIR="$TMPDIR/rebar3.cache"
+  '';
+
+  dontBuild = true;
+
+  installPhase = ''
+    mix deps.get --only ${mixEnv}
+  '';
+
+  outputHashAlgo = "sha256";
+  outputHashMode = "recursive";
+  outputHash = sha256;
+
+  impureEnvVars = lib.fetchers.proxyImpureEnvVars;
+  inherit meta;
+})