From 9ba8a0fc43f4ae0f8cd4db5a7bd1784280fe980a Mon Sep 17 00:00:00 2001
From: Karl Hallsby <karl@hallsby.com>
Date: Wed, 4 Mar 2026 10:49:49 -0600
Subject: [PATCH] octavePackages.windows: Run autoreconf hook on compiled
 sources

These sources include leftover config.guess and config.sub scripts
generated by upstream maintainer's bootstrap script. Their bootstrap
script uses wget to grab config.guess and config.sub files, which we
cannot do inside the Nix build environment. So we forcibly remove the
config.* scripts and run autoreconf ourselves (through
autoreconfHook).
---
 .../octave-modules/windows/default.nix        | 20 +++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/pkgs/development/octave-modules/windows/default.nix b/pkgs/development/octave-modules/windows/default.nix
index 8c25872f889a..19febc53dee6 100644
--- a/pkgs/development/octave-modules/windows/default.nix
+++ b/pkgs/development/octave-modules/windows/default.nix
@@ -3,6 +3,7 @@
   lib,
   fetchFromGitHub,
   nix-update-script,
+  autoreconfHook,
 }:
 
 buildOctavePackage rec {
@@ -16,6 +17,25 @@ buildOctavePackage rec {
     sha256 = "sha256-hr94VALlAEwpqNU7imEN63M0BdPFSu5IznhWOn/mNiQ=";
   };
 
+  nativeBuildInputs = [
+    autoreconfHook
+  ];
+
+  # autoreconfHook provides an autoreconfPhase that is run as a
+  # preconfigurePhase, which means it runs AFTER the source is un-tarred, and
+  # before buildOctavePackage's buildPhase re-tars it up into a format for later
+  # consumption by Octave's "pkg build" command.
+  preAutoreconf = ''
+    pushd src
+    # Upstream's bootstrap script uses wget to fetch config.guess & config.sub
+    # and has them committed to the repository. We must remove them so autoreconf
+    # actually fires for our environment.
+    rm config.*
+  '';
+  postAutoreconf = ''
+    popd
+  '';
+
   passthru.updateScript = nix-update-script { extraArgs = [ "--version-regex=release-(.*)" ]; };
 
   meta = {