From 271a0f8a2d38f0256db516ed236b8ba17641f3ef Mon Sep 17 00:00:00 2001
From: Qiming Chu <cchuqiming@gmail.com>
Date: Thu, 15 Jan 2026 21:18:04 +0800
Subject: [PATCH] yosys: fix plugin module flags and update environment
 variable

Yosys's handling of plugins changed considerably since 0.56.
This can fix `withPlugins` on current yosys version.

Signed-off-by: Qiming Chu <cchuqiming@gmail.com>
---
 pkgs/by-name/yo/yosys/package.nix | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/pkgs/by-name/yo/yosys/package.nix b/pkgs/by-name/yo/yosys/package.nix
index c4e06f4131bc..d100823bfa5c 100644
--- a/pkgs/by-name/yo/yosys/package.nix
+++ b/pkgs/by-name/yo/yosys/package.nix
@@ -62,9 +62,13 @@ let
     plugins:
     let
       paths = lib.closePropagation plugins;
+      libExt = stdenv.hostPlatform.extensions.sharedLibrary;
+      pluginPath = "$out/share/yosys/plugins";
       module_flags =
         with builtins;
-        concatStringsSep " " (map (n: "--add-flags -m --add-flags ${n.plugin}") plugins);
+        concatStringsSep " " (
+          map (n: "--add-flags -m --add-flags ${pluginPath}/${n.plugin}${libExt}") plugins
+        );
     in
     lib.appendToName "with-plugins" (symlinkJoin {
       inherit (yosys) name;
@@ -72,7 +76,7 @@ let
       nativeBuildInputs = [ makeWrapper ];
       postBuild = ''
         wrapProgram $out/bin/yosys \
-          --set NIX_YOSYS_PLUGIN_DIRS $out/share/yosys/plugins \
+          --set YOSYS_PATH $out/share/yosys \
           ${module_flags}
       '';
       meta.mainProgram = "yosys";