From f1165f8e40fd9e74dac7233140dc9cfb21758084 Mon Sep 17 00:00:00 2001
From: Ivan Mincik <ivan.mincik@gmail.com>
Date: Tue, 25 Nov 2025 09:03:53 +0100
Subject: [PATCH] mapserver: fix mapscript library reference on Darwin

Fix

```
    from . import _mapscript
ImportError:
dlopen(/nix/store/av8n3hrg1rs2akhi7b3x3rhn2ksap9fd-mapserver-8.4.1/lib/python3.13/site-packages/mapscript/_mapscript.so,
0x0002): Library not loaded: @rpath/libmapserver.2.dylib
  Referenced from: <9D2B480C-B82F-3E1F-93A8-E72C4A175236>
/nix/store/av8n3hrg1rs2akhi7b3x3rhn2ksap9fd-mapserver-8.4.1/lib/python3.13/site-packages/mapscript/_mapscript.so
  Reason: no LC_RPATH's found
```
---
 pkgs/by-name/ma/mapserver/package.nix | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/pkgs/by-name/ma/mapserver/package.nix b/pkgs/by-name/ma/mapserver/package.nix
index b1aa0a4a7b56..d57a6a1eb2ee 100644
--- a/pkgs/by-name/ma/mapserver/package.nix
+++ b/pkgs/by-name/ma/mapserver/package.nix
@@ -88,6 +88,12 @@ stdenv.mkDerivation rec {
     cp -r src/mapscript/python/mapscript $out/${python3.sitePackages}
   '';
 
+  # Fix mapscript library reference on Darwin
+  postFixup = lib.optionalString (withPython && stdenv.hostPlatform.isDarwin) ''
+    install_name_tool -change "@rpath/libmapserver.2.dylib" "$out/lib/libmapserver.2.dylib" \
+      $out/${python3.sitePackages}/mapscript/_mapscript.so
+  '';
+
   pythonImportsCheck = [ "mapscript" ];
 
   meta = {