From 2e0d57b792dcebb7c2170835ccde811cb8123a52 Mon Sep 17 00:00:00 2001
From: Thomas Watson <twatson52@icloud.com>
Date: Mon, 19 Aug 2024 14:54:35 -0500
Subject: [PATCH] micropython: reduce source size to within Hydra limit

Uncompressed NAR goes from ~3.3G to ~970M.
---
 .../interpreters/micropython/default.nix            | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/interpreters/micropython/default.nix b/pkgs/development/interpreters/micropython/default.nix
index b80038ff28f8..46a599987c82 100644
--- a/pkgs/development/interpreters/micropython/default.nix
+++ b/pkgs/development/interpreters/micropython/default.nix
@@ -15,10 +15,21 @@ stdenv.mkDerivation rec {
     owner = "micropython";
     repo = "micropython";
     rev = "v${version}";
-    sha256 = "sha256-sdok17HvKub/sI+8cAIIDaLD/3mu8yXXqrTOej8/UfU=";
+    sha256 = "sha256-7AA9n6UQchY6POkOp1VWAOAo87uRJSeCBhgvVXLoE04=";
     fetchSubmodules = true;
+
+    # remove unused libaries from rp2 port's SDK. we leave this and the other
+    # ports around for users who want to override makeFlags flags to build them.
+    # https://github.com/micropython/micropython/blob/a61c446c0b34e82aeb54b9770250d267656f2b7f/ports/rp2/CMakeLists.txt#L17-L22
+    #
+    # shrinks uncompressed NAR by ~2.4G (though it is still large). there
+    # doesn't seem to be a way to avoid fetching them in the first place.
+    postFetch = ''
+      rm -rf $out/lib/pico-sdk/lib/{tinyusb,lwip,btstack}
+    '';
   };
 
+
   nativeBuildInputs = [ pkg-config python3 ];
 
   buildInputs = [ libffi readline ];