From c75a2bda2fced25c24213d13011813a4c0affb5e Mon Sep 17 00:00:00 2001
From: aleksana <me@aleksana.moe>
Date: Mon, 24 Feb 2025 21:22:17 +0800
Subject: [PATCH 1/2] libxml2: add zlib support option

---
 .../development/libraries/libxml2/default.nix | 25 +++++++++++++------
 1 file changed, 17 insertions(+), 8 deletions(-)

diff --git a/pkgs/development/libraries/libxml2/default.nix b/pkgs/development/libraries/libxml2/default.nix
index d95edee18c96..a2bb0499eea3 100644
--- a/pkgs/development/libraries/libxml2/default.nix
+++ b/pkgs/development/libraries/libxml2/default.nix
@@ -22,6 +22,8 @@
     ),
   icuSupport ? false,
   icu,
+  zlibSupport ? false,
+  zlib,
   enableShared ? !stdenv.hostPlatform.isMinGW && !stdenv.hostPlatform.isStatic,
   enableStatic ? !enableShared,
   gnome,
@@ -68,6 +70,9 @@ stdenv.mkDerivation (finalAttrs: {
     ]
     ++ lib.optionals (stdenv.hostPlatform.isDarwin && pythonSupport && python ? isPy2 && python.isPy2) [
       libintl
+    ]
+    ++ lib.optionals zlibSupport [
+      zlib
     ];
 
   propagatedBuildInputs =
@@ -81,14 +86,18 @@ stdenv.mkDerivation (finalAttrs: {
       icu
     ];
 
-  configureFlags = [
-    "--exec-prefix=${placeholder "dev"}"
-    (lib.enableFeature enableStatic "static")
-    (lib.enableFeature enableShared "shared")
-    (lib.withFeature icuSupport "icu")
-    (lib.withFeature pythonSupport "python")
-    (lib.optionalString pythonSupport "PYTHON=${python.pythonOnBuildForHost.interpreter}")
-  ] ++ lib.optional enableHttp "--with-http";
+  configureFlags =
+    [
+      "--exec-prefix=${placeholder "dev"}"
+      (lib.enableFeature enableStatic "static")
+      (lib.enableFeature enableShared "shared")
+      (lib.withFeature icuSupport "icu")
+      (lib.withFeature pythonSupport "python")
+      (lib.optionalString pythonSupport "PYTHON=${python.pythonOnBuildForHost.interpreter}")
+    ]
+    # avoid rebuilds, can be merged into list in version bumps
+    ++ lib.optional enableHttp "--with-http"
+    ++ lib.optional zlibSupport "--with-zlib";
 
   installFlags = lib.optionals pythonSupport [
     "pythondir=\"${placeholder "py"}/${python.sitePackages}\""

From b7a8a56b87cc16a6c9f1ac61031393db5879dfe7 Mon Sep 17 00:00:00 2001
From: aleksana <me@aleksana.moe>
Date: Mon, 24 Feb 2025 21:38:21 +0800
Subject: [PATCH 2/2] dia: enable zlib in libxml2 to support gzipped archives

---
 pkgs/by-name/di/dia/package.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkgs/by-name/di/dia/package.nix b/pkgs/by-name/di/dia/package.nix
index 6331ed8b496b..fbb11047880d 100644
--- a/pkgs/by-name/di/dia/package.nix
+++ b/pkgs/by-name/di/dia/package.nix
@@ -44,7 +44,7 @@ stdenv.mkDerivation {
     [
       graphene
       gtk3
-      libxml2
+      (libxml2.override { zlibSupport = true; })
       python3
       poppler
     ]