diff --git a/pkgs/by-name/qt/qtwebapp/package.nix b/pkgs/by-name/qt/qtwebapp/package.nix
index b495955f5a6c..c2f04ff5df82 100644
--- a/pkgs/by-name/qt/qtwebapp/package.nix
+++ b/pkgs/by-name/qt/qtwebapp/package.nix
@@ -1,9 +1,10 @@
 {
   fetchFromGitHub,
   stdenv,
+  testers,
+  validatePkgConfig,
   lib,
   qt6,
-  ...
 }:
 stdenv.mkDerivation (finalAttrs: {
   pname = "qtwebapp";
@@ -15,6 +16,8 @@ stdenv.mkDerivation (finalAttrs: {
     hash = "sha256-RbFgz2ed1eEVy44LX+milP4hPSeiabakU3TMvHYR7TU=";
   };
 
+  __structuredAttrs = true;
+
   sourceRoot = "source/QtWebApp";
 
   postPatch = ''
@@ -29,19 +32,47 @@ stdenv.mkDerivation (finalAttrs: {
   nativeBuildInputs = [
     qt6.qmake
     qt6.wrapQtAppsHook
+    validatePkgConfig
   ];
 
-  buildInputs = [
+  propagatedBuildInputs = [
+    # For libs in the pkg-config, they must be
+    # propagated so that packages that depend on
+    # it can properly use it.
     qt6.qtbase
     qt6.qt5compat
   ];
 
   qmakeFlags = [ "QtWebApp.pro" ];
 
+  pkgConfigFile = ./pkg-config.in;
+
+  postInstall = ''
+    mkdir -p "$out/lib/pkgconfig"
+    cp "$pkgConfigFile" "$out/lib/pkgconfig/QtWebApp.pc"
+    substituteInPlace "$out/lib/pkgconfig/QtWebApp.pc" \
+      --subst-var out \
+      --subst-var version
+
+    mkdir -p "$out/include/QtWebApp/httpserver"
+    cp httpserver/*.h "$out/include/QtWebApp/httpserver"
+
+    mkdir -p "$out/include/QtWebApp/logging"
+    cp logging/*.h "$out/include/QtWebApp/logging"
+
+    mkdir -p "$out/include/QtWebApp/templateengine"
+    cp templateengine/*.h "$out/include/QtWebApp/templateengine"
+  '';
+
+  passthru.tests.pkg-config = testers.testMetaPkgConfig finalAttrs.finalPackage;
+
   meta = {
     maintainers = with lib.maintainers; [ xddxdd ];
     description = "HTTP server library in C++, inspired by Java Servlets";
     homepage = "https://stefanfrings.de/qtwebapp/index-en.html";
     license = lib.licenses.lgpl3Plus;
+    pkgConfigModules = [
+      "QtWebApp"
+    ];
   };
 })
diff --git a/pkgs/by-name/qt/qtwebapp/pkg-config.in b/pkgs/by-name/qt/qtwebapp/pkg-config.in
new file mode 100644
index 000000000000..265cbfda591a
--- /dev/null
+++ b/pkgs/by-name/qt/qtwebapp/pkg-config.in
@@ -0,0 +1,14 @@
+prefix=@out@
+exec_prefix=${prefix}
+libdir=${exec_prefix}/lib
+includedir_http=${prefix}/include/QtWebApp/httpserver
+includedir_logging=${prefix}/include/QtWebApp/logging
+includedir_template=${prefix}/include/QtWebApp/templateengine
+
+Name: QtWebApp
+Description: HTTP server and utility library in C++
+Version: @version@
+Requires: Qt6Network Qt6Core5Compat
+Libs: -L${libdir} -lQtWebApp
+Cflags: -I${includedir_http} -I${includedir_logging} -I${includedir_template}
+
diff --git a/pkgs/by-name/ya/yacreader/darwin-unarr-use-pkg-config.patch b/pkgs/by-name/ya/yacreader/darwin-unarr-use-pkg-config.patch
deleted file mode 100644
index dff2b69df514..000000000000
--- a/pkgs/by-name/ya/yacreader/darwin-unarr-use-pkg-config.patch
+++ /dev/null
@@ -1,13 +0,0 @@
-diff --git a/compressed_archive/unarr/unarr-wrapper.pri b/compressed_archive/unarr/unarr-wrapper.pri
-index 0115267..5d3d6f5 100644
---- a/compressed_archive/unarr/unarr-wrapper.pri
-+++ b/compressed_archive/unarr/unarr-wrapper.pri
-@@ -6,7 +6,7 @@ HEADERS += $$PWD/extract_delegate.h \
- 
- SOURCES += $$PWD/compressed_archive.cpp
- 
--if(mingw|unix):!macx:!contains(QT_CONFIG, no-pkg-config):packagesExist(libunarr) {
-+if(mingw|unix):!contains(QT_CONFIG, no-pkg-config):packagesExist(libunarr) {
-   message(Using system provided unarr installation found by pkg-config.)
-   CONFIG += link_pkgconfig
-   PKGCONFIG += libunarr
diff --git a/pkgs/by-name/ya/yacreader/package.nix b/pkgs/by-name/ya/yacreader/package.nix
index 1a9ed2c685b7..b678a634fa0d 100644
--- a/pkgs/by-name/ya/yacreader/package.nix
+++ b/pkgs/by-name/ya/yacreader/package.nix
@@ -2,50 +2,86 @@
   lib,
   stdenv,
   fetchFromGitHub,
+  cmake,
+  pkg-config,
+  ctestCheckHook,
   libGLU,
   libunarr,
-  libsForQt5,
-  pkg-config,
+  expat,
+  libdeflate,
+  lerc,
+  xz,
+  libwebp,
+  qtwebapp,
+  pipewire,
+  qt6Packages,
+  onlyServer ? false,
 }:
-
+let
+  qtPackages = qt6Packages;
+in
 stdenv.mkDerivation (finalAttrs: {
   pname = "yacreader";
-  version = "9.16.3";
+  version = "10.0.0";
 
   src = fetchFromGitHub {
     owner = "YACReader";
     repo = "yacreader";
     tag = finalAttrs.version;
-    hash = "sha256-3mLmH6HJnH+LH/NkqI4G8Si5od3YiWnQ/kv5rmPFhlE=";
+    hash = "sha256-nJ4S4ej/I+ifDNa3CPpusFpDsEwZwYDt0JLaebptjuU=";
   };
 
   patches = [
-    # make the unarr backend logic use pkg-config even on Darwin
-    ./darwin-unarr-use-pkg-config.patch
+    # Devendor qtwebapp, use pkg-config instead
+    ./qtwebapp-devendor.patch
   ];
 
-  qmakeFlags = [
+  # Ensure devendor works
+  postPatch = ''
+    rm -rf third_party/QtWebApp
+  '';
+
+  # Pipewire is dlopen'd, so we must tell it where to look
+  preConfigure = ''
+    qtWrapperArgs+=("--prefix" "LD_LIBRARY_PATH" ":" "${lib.makeLibraryPath [ pipewire ]}")
+  '';
+
+  strictDeps = true;
+  __structuredAttrs = true;
+
+  cmakeFlags = [
     # force unarr backend on all platforms
-    "CONFIG+=unarr"
+    (lib.cmakeBool "BUILD_SERVER_STANDALONE" onlyServer)
+    (lib.cmakeFeature "PDF_BACKEND" "poppler")
+    (lib.cmakeFeature "DECOMPRESSION_BACKEND" "unarr")
   ];
 
   nativeBuildInputs = [
-    libsForQt5.qmake
-    libsForQt5.qttools # for translations
-    libsForQt5.wrapQtAppsHook
+    cmake
     pkg-config
+    qtPackages.wrapQtAppsHook
   ];
 
   buildInputs = [
     libGLU
-    libsForQt5.poppler
-    libsForQt5.qtgraphicaleffects # imported, but not declared as a dependency
-    libsForQt5.qtmultimedia
-    libsForQt5.qtquickcontrols2
     libunarr
-  ]
-  ++ lib.optionals stdenv.hostPlatform.isDarwin [
-    libsForQt5.qtmacextras # can be removed when using qt6
+    expat
+    libdeflate
+    lerc
+    xz
+    libwebp
+    qtwebapp
+    qtPackages.qtbase
+    qtPackages.qttools
+    qtPackages.qtmultimedia
+    qtPackages.qtspeech
+    qtPackages.poppler
+    qtPackages.qt5compat
+  ];
+
+  doCheck = true;
+  nativeCheckInputs = [
+    ctestCheckHook
   ];
 
   # custom Darwin install instructions taken from the upstream compileOSX.sh script
diff --git a/pkgs/by-name/ya/yacreader/qtwebapp-devendor.patch b/pkgs/by-name/ya/yacreader/qtwebapp-devendor.patch
new file mode 100644
index 000000000000..0de92f2311ce
--- /dev/null
+++ b/pkgs/by-name/ya/yacreader/qtwebapp-devendor.patch
@@ -0,0 +1,69 @@
+diff --git a/YACReaderLibrary/server/CMakeLists.txt b/YACReaderLibrary/server/CMakeLists.txt
+index 839072efe4..8b8a2a5dd4 100644
+--- a/YACReaderLibrary/server/CMakeLists.txt
++++ b/YACReaderLibrary/server/CMakeLists.txt
+@@ -77,10 +77,10 @@
+     Qt6::Core
+     Qt6::Network
+     Qt6::Sql
+-    QtWebApp_httpserver
+-    QtWebApp_templateengine
+     QsLog
+     common_all
+     comic_backend
+     db_helper
++    PRIVATE
++    PkgConfig::QtWebApp
+ )
+diff --git a/third_party/CMakeLists.txt b/third_party/CMakeLists.txt
+index 512e57457f..787f334698 100644
+--- a/third_party/CMakeLists.txt
++++ b/third_party/CMakeLists.txt
+@@ -31,45 +31,8 @@
+ target_include_directories(QrCode PUBLIC QrCode)
+ 
+ # --- QtWebApp HTTP server ---
+-add_library(QtWebApp_httpserver STATIC
+-    QtWebApp/httpserver/httpglobal.cpp
+-    QtWebApp/httpserver/httplistener.cpp
+-    QtWebApp/httpserver/httpconnectionhandler.cpp
+-    QtWebApp/httpserver/httpconnectionhandlerpool.cpp
+-    QtWebApp/httpserver/httprequest.cpp
+-    QtWebApp/httpserver/httpresponse.cpp
+-    QtWebApp/httpserver/httpcookie.cpp
+-    QtWebApp/httpserver/httprequesthandler.cpp
+-    QtWebApp/httpserver/httpsession.cpp
+-    QtWebApp/httpserver/httpsessionstore.cpp
+-    QtWebApp/httpserver/staticfilecontroller.cpp
+-    QtWebApp/httpserver/httpglobal.h
+-    QtWebApp/httpserver/httplistener.h
+-    QtWebApp/httpserver/httpconnectionhandler.h
+-    QtWebApp/httpserver/httpconnectionhandlerpool.h
+-    QtWebApp/httpserver/httprequest.h
+-    QtWebApp/httpserver/httpresponse.h
+-    QtWebApp/httpserver/httpcookie.h
+-    QtWebApp/httpserver/httprequesthandler.h
+-    QtWebApp/httpserver/httpsession.h
+-    QtWebApp/httpserver/httpsessionstore.h
+-    QtWebApp/httpserver/staticfilecontroller.h
+-)
+-target_include_directories(QtWebApp_httpserver PUBLIC QtWebApp/httpserver)
+-target_link_libraries(QtWebApp_httpserver PUBLIC Qt6::Network)
+-
+-# --- QtWebApp template engine ---
+-add_library(QtWebApp_templateengine STATIC
+-    QtWebApp/templateengine/template.cpp
+-    QtWebApp/templateengine/templateloader.cpp
+-    QtWebApp/templateengine/templatecache.cpp
+-    QtWebApp/templateengine/templateglobal.h
+-    QtWebApp/templateengine/template.h
+-    QtWebApp/templateengine/templateloader.h
+-    QtWebApp/templateengine/templatecache.h
+-)
+-target_include_directories(QtWebApp_templateengine PUBLIC QtWebApp/templateengine)
+-target_link_libraries(QtWebApp_templateengine PUBLIC Qt6::Core5Compat)
++find_package(PkgConfig REQUIRED)
++pkg_check_modules(QtWebApp REQUIRED IMPORTED_TARGET GLOBAL QtWebApp)
+ 
+ # --- KDSignalThrottler (from KDToolBox) ---
+ add_library(KDSignalThrottler STATIC