wrapQtAppsHook: wrap Qt applications for runtime dependencies

nixos/modules/services/x11/desktop-managers/plasma5.nix

@@ -64,8 +64,8 @@ in
       };
 
       security.wrappers = {
-        kcheckpass.source = "${lib.getBin plasma5.kscreenlocker}/lib/libexec/kcheckpass";
+        kcheckpass.source = "${lib.getBin plasma5.kscreenlocker}/libexec/kcheckpass";
-        "start_kdeinit".source = "${lib.getBin pkgs.kinit}/lib/libexec/kf5/start_kdeinit";
+        "start_kdeinit".source = "${lib.getBin pkgs.kinit}/libexec/kf5/start_kdeinit";
         kwin_wayland = {
           source = "${lib.getBin plasma5.kwin}/bin/kwin_wayland";
           capabilities = "cap_sys_nice+ep";

pkgs/applications/kde/ark/default.nix

@@ -1,37 +1,39 @@
 {
-  mkDerivation, lib, makeWrapper,
+  mkDerivation, lib, config,
 
   extra-cmake-modules, kdoctools,
 
-  karchive, kconfig, kcrash, kdbusaddons, ki18n, kiconthemes, kitemmodels,
+  breeze-icons, karchive, kconfig, kcrash, kdbusaddons, ki18n,
-  khtml, kio, kparts, kpty, kservice, kwidgetsaddons, libarchive,
+  kiconthemes, kitemmodels, khtml, kio, kparts, kpty, kservice, kwidgetsaddons,
+
+  libarchive, libzip,
 
   # Archive tools
-  p7zip, unzip, zip,
+  p7zip, lrzip,
 
   # Unfree tools
   unfreeEnableUnrar ? false, unrar,
 }:
 
+let
+  extraTools = [ p7zip lrzip ] ++ lib.optional unfreeEnableUnrar unrar;
+in
+
 mkDerivation {
   name = "ark";
-  nativeBuildInputs = [ extra-cmake-modules kdoctools makeWrapper ];
-  propagatedBuildInputs = [
-    karchive kconfig kcrash kdbusaddons khtml ki18n kiconthemes kio kitemmodels
-    kparts kpty kservice kwidgetsaddons libarchive
-  ];
-  outputs = [ "out" "dev" ];
-  postFixup =
-    let
-      PATH =
-        lib.makeBinPath
-        ([ p7zip unzip zip ] ++ lib.optional unfreeEnableUnrar unrar);
-    in ''
-      wrapProgram "$out/bin/ark" --prefix PATH : "${PATH}"
-    '';
   meta = {
     license = with lib.licenses;
       [ gpl2 lgpl3 ] ++ lib.optional unfreeEnableUnrar unfree;
     maintainers = [ lib.maintainers.ttuegel ];
   };
+
+  outputs = [ "out" "dev" ];
+  nativeBuildInputs = [ extra-cmake-modules kdoctools ];
+  buildInputs = [ libarchive libzip ] ++ extraTools;
+  propagatedBuildInputs = [
+    breeze-icons karchive kconfig kcrash kdbusaddons khtml ki18n kiconthemes kio
+    kitemmodels kparts kpty kservice kwidgetsaddons
+  ];
+
+  qtWrapperArgs = [ "--prefix" "PATH" ":" (lib.makeBinPath extraTools) ];
 }

pkgs/applications/kde/okular.nix

@@ -1,18 +1,18 @@
 {
   stdenv, mkDerivation, lib,
   extra-cmake-modules, kdoctools,
-  chmlib ? null, discount, djvulibre, ebook_tools, kactivities, karchive, kbookmarks,
+  breeze-icons, chmlib ? null, discount, djvulibre, ebook_tools, kactivities,
-  kcompletion, kconfig, kconfigwidgets, kcoreaddons, kdbusaddons,
+  karchive, kbookmarks, kcompletion, kconfig, kconfigwidgets, kcoreaddons,
-  kdegraphics-mobipocket, kiconthemes, kjs, khtml, kio, kparts, kpty, kwallet,
+  kdbusaddons, kdegraphics-mobipocket, kiconthemes, kjs, khtml, kio, kparts,
-  kwindowsystem, libkexiv2, libspectre, libzip, phonon, poppler, qca-qt5,
+  kpty, kwallet, kwindowsystem, libkexiv2, libspectre, libzip, phonon, poppler,
-  qtdeclarative, qtsvg, threadweaver, kcrash
+  qca-qt5, qtdeclarative, qtsvg, threadweaver, kcrash
 }:
 
 mkDerivation {
   name = "okular";
   nativeBuildInputs = [ extra-cmake-modules kdoctools ];
   buildInputs = [
-    discount djvulibre ebook_tools kactivities karchive kbookmarks
+    breeze-icons discount djvulibre ebook_tools kactivities karchive kbookmarks
     kcompletion kconfig kconfigwidgets kcoreaddons kdbusaddons
     kdegraphics-mobipocket kiconthemes kjs khtml kio kparts kpty kwallet
     kwindowsystem libkexiv2 libspectre libzip phonon poppler qca-qt5

pkgs/desktops/plasma-5/plasma-workspace/default.nix

@@ -34,7 +34,8 @@ mkDerivation {
 
     qtgraphicaleffects qtquickcontrols qtquickcontrols2 qtscript qtwayland qtx11extras
   ];
-  outputs = [ "bin" "dev" "out" ];
+  propagatedUserEnvPkgs = [ qtgraphicaleffects ];
+  outputs = [ "out" "dev" ];
 
   cmakeFlags = [
     "-DNIXPKGS_XMESSAGE=${getBin xmessage}/bin/xmessage"
@@ -45,7 +46,7 @@ mkDerivation {
     "-DNIXPKGS_XPROP=${getBin xprop}/bin/xprop"
     "-DNIXPKGS_ID=${getBin coreutils}/bin/id"
     "-DNIXPKGS_DBUS_UPDATE_ACTIVATION_ENVIRONMENT=${getBin dbus}/bin/dbus-update-activation-environment"
-    "-DNIXPKGS_START_KDEINIT_WRAPPER=${getLib kinit}/lib/libexec/kf5/start_kdeinit_wrapper"
+    "-DNIXPKGS_START_KDEINIT_WRAPPER=${getLib kinit}/libexec/kf5/start_kdeinit_wrapper"
     "-DNIXPKGS_QDBUS=${getBin qttools}/bin/qdbus"
     "-DNIXPKGS_KWRAPPER5=${getBin kinit}/bin/kwrapper5"
     "-DNIXPKGS_KREADCONFIG5=${getBin kconfig}/bin/kreadconfig5"
@@ -72,10 +73,6 @@ mkDerivation {
 
   preConfigure = ''
     NIX_CFLAGS_COMPILE+=" -DNIXPKGS_KDOSTARTUPCONFIG5=\"''${!outputBin}/bin/kdostartupconfig5\""
-    cmakeFlags+=" -DNIXPKGS_STARTPLASMA=''${!outputBin}/lib/libexec/startplasma"
+    cmakeFlags+=" -DNIXPKGS_STARTPLASMA=''${!outputBin}/libexec/startplasma"
-  '';
-
-  postInstall = ''
-    moveToOutput lib/libexec/startplasma ''${!outputBin}
   '';
 }

pkgs/development/libraries/kde-frameworks/default.nix

@@ -45,17 +45,9 @@ let
                 if [ "$hookName" != postHook ]; then
                     postHooks+=("source @dev@/nix-support/setup-hook")
                 else
-                    # Propagate $${out} output
-                    propagatedUserEnvPkgs="$propagatedUserEnvPkgs @${out}@"
-
-                    if [ -z "$outputDev" ]; then
-                        echo "error: \$outputDev is unset!" >&2
-                        exit 1
-                    fi
-
                     # Propagate $dev so that this setup hook is propagated
                     # But only if there is a separate $dev output
-                    if [ "$outputDev" != out ]; then
+                    if [ "''${outputDev:?}" != out ]; then
                         propagatedBuildInputs="$propagatedBuildInputs @dev@"
                     fi
                 fi
@@ -75,10 +67,9 @@ let
             inherit (srcs."${name}") src version;
 
             outputs = args.outputs or [ "bin" "dev" "out" ];
-            hasBin = lib.elem "bin" outputs;
+            hasSeparateDev = lib.elem "dev" outputs;
-            hasDev = lib.elem "dev" outputs;
 
-            defaultSetupHook = if hasBin && hasDev then propagateBin else null;
+            defaultSetupHook = if hasSeparateDev then propagateBin else null;
             setupHook = args.setupHook or defaultSetupHook;
 
             meta = {

pkgs/development/libraries/kde-frameworks/extra-cmake-modules/setup-hook.sh

@@ -1,16 +1,16 @@
-_ecmEnvHook() {
+ecmEnvHook() {
     addToSearchPath XDG_DATA_DIRS "$1/share"
     addToSearchPath XDG_CONFIG_DIRS "$1/etc/xdg"
 }
-addEnvHooks "$targetOffset" _ecmEnvHook
+addEnvHooks "$targetOffset" ecmEnvHook
 
-_ecmPreConfigureHook() {
+ecmPostHook() {
     # Because we need to use absolute paths here, we must set *all* the paths.
     cmakeFlags+=" -DKDE_INSTALL_EXECROOTDIR=${!outputBin}"
     cmakeFlags+=" -DKDE_INSTALL_BINDIR=${!outputBin}/bin"
     cmakeFlags+=" -DKDE_INSTALL_SBINDIR=${!outputBin}/sbin"
     cmakeFlags+=" -DKDE_INSTALL_LIBDIR=${!outputLib}/lib"
-    cmakeFlags+=" -DKDE_INSTALL_LIBEXECDIR=${!outputLib}/lib/libexec"
+    cmakeFlags+=" -DKDE_INSTALL_LIBEXECDIR=${!outputLib}/libexec"
     cmakeFlags+=" -DKDE_INSTALL_CMAKEPACKAGEDIR=${!outputDev}/lib/cmake"
     cmakeFlags+=" -DKDE_INSTALL_INCLUDEDIR=${!outputInclude}/include"
     cmakeFlags+=" -DKDE_INSTALL_LOCALSTATEDIR=/var"
@@ -51,4 +51,58 @@ _ecmPreConfigureHook() {
         cmakeFlags+=" -DKDE_INSTALL_QMLDIR=${!outputBin}/$qtQmlPrefix"
     fi
 }
-preConfigureHooks+=(_ecmPreConfigureHook)
+postHooks+=(ecmPostHook)
+
+xdgDataSubdirs=(
+    "doc" "config.kcfg" "kconf_update" "kservices5" "kservicetypes5" \
+    "kxmlgui5" "knotifications5" "icons" "locale" "sounds" "templates" \
+    "wallpapers" "applications" "desktop-directories" "mime" "appdata" "dbus-1" \
+)
+
+
+ecmHostPathSeen=( )
+
+ecmUnseenHostPath() {
+    for pkg in "${ecmHostPathSeen[@]}"
+    do
+        if [ "${pkg:?}" == "$1" ]
+        then
+            return 1
+        fi
+    done
+
+    ecmHostPathSeen+=("$1")
+    return 0
+}
+
+ecmHostPathHook() {
+    ecmUnseenHostPath "$1" || return 0
+
+    local xdgConfigDir="$1/etc/xdg"
+    if [ -d "$xdgConfigDir" ]
+    then
+        qtWrapperArgs+=(--prefix XDG_CONFIG_DIRS : "$xdgConfigDir")
+    fi
+
+    for xdgDataSubdir in "${xdgDataSubdirs[@]}"
+    do
+        if [ -d "$1/share/$xdgDataSubdir" ]
+        then
+            qtWrapperArgs+=(--prefix XDG_DATA_DIRS : "$1/share")
+            break
+        fi
+    done
+
+    local manDir="$1/man"
+    if [ -d "$manDir" ]
+    then
+        qtWrapperArgs+=(--prefix MANPATH : "$manDir")
+    fi
+
+    local infoDir="$1/info"
+    if [ -d "$infoDir" ]
+    then
+        qtWrapperArgs+=(--prefix INFOPATH : "$infoDir")
+    fi
+}
+addEnvHooks "$hostOffset" ecmHostPathHook

pkgs/development/libraries/kde-frameworks/kinit/default.nix

@@ -9,6 +9,7 @@ let inherit (lib) getLib; in
 mkDerivation {
   name = "kinit";
   meta = { maintainers = [ lib.maintainers.ttuegel ]; };
+  outputs = [ "out" "dev" ];
   nativeBuildInputs = [ extra-cmake-modules kdoctools ];
   buildInputs = [
     kconfig kcrash ki18n kio kservice kwindowsystem
@@ -19,9 +20,6 @@ mkDerivation {
     ''-DNIXPKGS_KF5_PARTS=\"${getLib kparts}/lib/libKF5Parts.so.5\"''
     ''-DNIXPKGS_KF5_PLASMA=\"${getLib plasma-framework}/lib/libKF5Plasma.so.5\"''
   ];
-  postFixup = ''
-    moveToOutput "lib/libexec/kf5/start_kdeinit" "$bin"
-  '';
   setupHook = writeScript "setup-hook.sh" ''
     kinitFixupOutputHook() {
         if [ $prefix != ''${!outputBin} ] && [ -d $prefix/lib ]; then

pkgs/development/libraries/qt-5/5.11/default.nix

@@ -17,7 +17,7 @@ top-level attribute to `top-level/all-packages.nix`.
 
 {
   newScope,
-  stdenv, fetchurl, fetchFromGitHub, makeSetupHook,
+  stdenv, fetchurl, fetchFromGitHub, makeSetupHook, makeWrapper,
   bison, cups ? null, harfbuzz, libGL, perl,
   gstreamer, gst-plugins-base, gtk3, dconf,
   cf-private, llvmPackages_5,
@@ -34,6 +34,8 @@ let
 
   qtCompatVersion = "5.11";
 
+  stdenvActual = if stdenv.cc.isClang then llvmPackages_5.stdenv else stdenv;
+
   mirror = "https://download.qt.io";
   srcs = import ./srcs.nix { inherit fetchurl; inherit mirror; } // {
     # Community port of the now unmaintained upstream qtwebkit.
@@ -64,16 +66,18 @@ let
     qtwebkit = [ ./qtwebkit.patch ];
   };
 
-  mkDerivation =
-    import ../mkDerivation.nix {
-      inherit (stdenv) lib;
-      stdenv = if stdenv.cc.isClang then llvmPackages_5.stdenv else stdenv;
-    }
-    { inherit debug; };
-
   qtModule =
     import ../qtModule.nix
-    { inherit mkDerivation perl; inherit (stdenv) lib; }
+    {
+      inherit perl;
+      inherit (stdenv) lib;
+      # Use a variant of mkDerivation that does not include wrapQtApplications
+      # to avoid cyclic dependencies between Qt modules.
+      mkDerivation =
+        import ../mkDerivation.nix
+        { inherit (stdenv) lib; inherit debug; wrapQtAppsHook = null; }
+        stdenvActual.mkDerivation;
+    }
     { inherit self srcs patches; };
 
   addPackages = self: with self;
@@ -81,7 +85,11 @@ let
       callPackage = self.newScope { inherit qtCompatVersion qtModule srcs; };
     in {
 
-      inherit mkDerivation;
+      mkDerivationWith =
+        import ../mkDerivation.nix
+        { inherit (stdenv) lib; inherit debug; inherit (self) wrapQtAppsHook; };
+
+      mkDerivation = mkDerivationWith stdenvActual.mkDerivation;
 
       qtbase = callPackage ../modules/qtbase.nix {
         inherit (srcs.qtbase) src version;
@@ -146,6 +154,12 @@ let
           fix_qt_builtin_paths = ../hooks/fix-qt-builtin-paths.sh;
         };
       } ../hooks/qmake-hook.sh;
+
+      wrapQtAppsHook = makeSetupHook {
+        deps =
+          [ self.qtbase.dev makeWrapper ]
+          ++ optional stdenv.isLinux self.qtwayland.dev;
+      } ../hooks/wrap-qt-apps-hook.sh;
     };
 
    self = makeScope newScope addPackages;

pkgs/development/libraries/qt-5/5.12/default.nix

@@ -17,7 +17,7 @@ top-level attribute to `top-level/all-packages.nix`.
 
 {
   newScope,
-  stdenv, fetchurl, fetchFromGitHub, makeSetupHook,
+  stdenv, fetchurl, fetchFromGitHub, makeSetupHook, makeWrapper,
   bison, cups ? null, harfbuzz, libGL, perl,
   gstreamer, gst-plugins-base, gtk3, dconf,
   cf-private, llvmPackages_5,
@@ -34,6 +34,8 @@ let
 
   qtCompatVersion = "5.12";
 
+  stdenvActual = if stdenv.cc.isClang then llvmPackages_5.stdenv else stdenv;
+
   mirror = "https://download.qt.io";
   srcs = import ./srcs.nix { inherit fetchurl; inherit mirror; } // {
     # Community port of the now unmaintained upstream qtwebkit.
@@ -69,16 +71,18 @@ let
     qttools = [ ./qttools.patch ];
   };
 
-  mkDerivation =
-    import ../mkDerivation.nix {
-      inherit (stdenv) lib;
-      stdenv = if stdenv.cc.isClang then llvmPackages_5.stdenv else stdenv;
-    }
-    { inherit debug; };
-
   qtModule =
     import ../qtModule.nix
-    { inherit mkDerivation perl; inherit (stdenv) lib; }
+    {
+      inherit perl;
+      inherit (stdenv) lib;
+      # Use a variant of mkDerivation that does not include wrapQtApplications
+      # to avoid cyclic dependencies between Qt modules.
+      mkDerivation =
+        import ../mkDerivation.nix
+        { inherit (stdenv) lib; inherit debug; wrapQtAppsHook = null; }
+        stdenvActual.mkDerivation;
+    }
     { inherit self srcs patches; };
 
   addPackages = self: with self;
@@ -86,7 +90,11 @@ let
       callPackage = self.newScope { inherit qtCompatVersion qtModule srcs; };
     in {
 
-      inherit mkDerivation;
+      mkDerivationWith =
+        import ../mkDerivation.nix
+        { inherit (stdenv) lib; inherit debug; inherit (self) wrapQtAppsHook; };
+
+      mkDerivation = mkDerivationWith stdenvActual.mkDerivation;
 
       qtbase = callPackage ../modules/qtbase.nix {
         inherit (srcs.qtbase) src version;
@@ -151,6 +159,12 @@ let
           fix_qt_builtin_paths = ../hooks/fix-qt-builtin-paths.sh;
         };
       } ../hooks/qmake-hook.sh;
+
+      wrapQtAppsHook = makeSetupHook {
+        deps =
+          [ self.qtbase.dev makeWrapper ]
+          ++ optional stdenv.isLinux self.qtwayland.dev;
+      } ../hooks/wrap-qt-apps-hook.sh;
     };
 
    self = makeScope newScope addPackages;

pkgs/development/libraries/qt-5/5.6/default.nix

@@ -26,7 +26,7 @@ existing packages here and modify it as necessary.
 
 {
   newScope,
-  stdenv, fetchurl, fetchpatch, makeSetupHook,
+  stdenv, fetchurl, fetchpatch, makeSetupHook, makeWrapper,
   bison, cups ? null, harfbuzz, libGL, perl,
   gstreamer, gst-plugins-base,
   cf-private,
@@ -105,14 +105,18 @@ let
     ];
   };
 
-  mkDerivation =
-    import ../mkDerivation.nix
-    { inherit stdenv; inherit (stdenv) lib; }
-    { inherit debug; };
-
   qtModule =
     import ../qtModule.nix
-    { inherit mkDerivation perl; inherit (stdenv) lib; }
+    {
+      inherit perl;
+      inherit (stdenv) lib;
+      # Use a variant of mkDerivation that does not include wrapQtApplications
+      # to avoid cyclic dependencies between Qt modules.
+      mkDerivation =
+        import ../mkDerivation.nix
+        { inherit (stdenv) lib; inherit debug; wrapQtAppsHook = null; }
+        stdenv.mkDerivation;
+    }
     { inherit self srcs patches; };
 
   addPackages = self: with self;
@@ -120,7 +124,11 @@ let
       callPackage = self.newScope { inherit qtCompatVersion qtModule srcs; };
     in {
 
-      inherit mkDerivation;
+      mkDerivationWith =
+        import ../mkDerivation.nix
+        { inherit (stdenv) lib; inherit debug; inherit (self) wrapQtAppsHook; };
+
+      mkDerivation = mkDerivationWith stdenv.mkDerivation;
 
       qtbase = callPackage ../modules/qtbase.nix {
         inherit bison cups harfbuzz libGL;
@@ -176,6 +184,12 @@ let
         deps = [ self.qtbase.dev ];
         substitutions = { inherit (stdenv) isDarwin; };
       } ../hooks/qmake-hook.sh;
+
+      wrapQtAppsHook = makeSetupHook {
+        deps =
+          [ self.qtbase.dev makeWrapper ]
+          ++ optional stdenv.isLinux self.qtwayland.dev;
+      } ../hooks/wrap-qt-apps-hook.sh;
     };
 
    self = makeScope newScope addPackages;

pkgs/development/libraries/qt-5/5.9/default.nix

@@ -17,7 +17,7 @@ top-level attribute to `top-level/all-packages.nix`.
 
 {
   newScope,
-  stdenv, fetchurl, fetchpatch, makeSetupHook,
+  stdenv, fetchurl, fetchpatch, makeSetupHook, makeWrapper,
   bison, cups ? null, harfbuzz, libGL, perl,
   gstreamer, gst-plugins-base, gtk3, dconf,
   cf-private,
@@ -68,14 +68,18 @@ let
 
   };
 
-  mkDerivation =
-    import ../mkDerivation.nix
-    { inherit stdenv; inherit (stdenv) lib; }
-    { inherit debug; };
-
   qtModule =
     import ../qtModule.nix
-    { inherit mkDerivation perl; inherit (stdenv) lib; }
+    {
+      inherit perl;
+      inherit (stdenv) lib;
+      # Use a variant of mkDerivation that does not include wrapQtApplications
+      # to avoid cyclic dependencies between Qt modules.
+      mkDerivation =
+        import ../mkDerivation.nix
+        { inherit (stdenv) lib; inherit debug; wrapQtAppsHook = null; }
+        stdenv.mkDerivation;
+    }
     { inherit self srcs patches; };
 
   addPackages = self: with self;
@@ -83,7 +87,11 @@ let
       callPackage = self.newScope { inherit qtCompatVersion qtModule srcs; };
     in {
 
-      inherit mkDerivation;
+      mkDerivationWith =
+        import ../mkDerivation.nix
+        { inherit (stdenv) lib; inherit debug; inherit (self) wrapQtAppsHook; };
+
+      mkDerivation = mkDerivationWith stdenv.mkDerivation;
 
       qtbase = callPackage ../modules/qtbase.nix {
         inherit (srcs.qtbase) src version;
@@ -145,6 +153,12 @@ let
           fix_qt_builtin_paths = ../hooks/fix-qt-builtin-paths.sh;
         };
       } ../hooks/qmake-hook.sh;
+
+      wrapQtAppsHook = makeSetupHook {
+        deps =
+          [ self.qtbase.dev makeWrapper ]
+          ++ optional stdenv.isLinux self.qtwayland.dev;
+      } ../hooks/wrap-qt-apps-hook.sh;
     };
 
    self = makeScope newScope addPackages;

pkgs/development/libraries/qt-5/hooks/qtbase-setup-hook.sh

@@ -19,12 +19,14 @@ export QMAKEPATH
 QMAKEMODULES=
 export QMAKEMODULES
 
-addToQMAKEPATH() {
+qmakePathHook() {
-    if [ -d "$1/mkspecs" ]; then
+    if [ -d "$1/mkspecs" ]
+    then
         QMAKEMODULES="${QMAKEMODULES}${QMAKEMODULES:+:}/mkspecs"
         QMAKEPATH="${QMAKEPATH}${QMAKEPATH:+:}$1"
     fi
 }
+envBuildHostHooks+=(qmakePathHook)
 
 # Propagate any runtime dependency of the building package.
 # Each dependency is propagated to the user environment and as a build
@@ -32,18 +34,18 @@ addToQMAKEPATH() {
 # package depending on the building package. (This is necessary in case
 # the building package does not provide runtime dependencies itself and so
 # would not be propagated to the user environment.)
-qtEnvHook() {
+qtEnvHostTargetHook() {
-    addToQMAKEPATH "$1"
+    if providesQtRuntime "$1" && [ "z${!outputBin}" != "z${!outputDev}" ]
-    if providesQtRuntime "$1"; then
+    then
-        if [ "z${!outputBin}" != "z${!outputDev}" ]; then
+        propagatedBuildInputs+=" $1"
-            propagatedBuildInputs+=" $1"
-        fi
-        propagatedUserEnvPkgs+=" $1"
     fi
 }
-envHostTargetHooks+=(qtEnvHook)
+envHostTargetHooks+=(qtEnvHostTargetHook)
 
 postPatchMkspecs() {
+    # Prevent this hook from running multiple times
+    dontPatchMkspecs=1
+
     local bin="${!outputBin}"
     local dev="${!outputDev}"
     local doc="${!outputDoc}"

pkgs/development/libraries/qt-5/hooks/wrap-qt-apps-hook.sh

@@ -0,0 +1,106 @@
+# Inherit arguments given in mkDerivation
+qtWrapperArgs=( $qtWrapperArgs )
+
+qtHostPathSeen=()
+
+qtUnseenHostPath() {
+    for pkg in "${qtHostPathSeen[@]}"
+    do
+        if [ "${pkg:?}" == "$1" ]
+        then
+            return 1
+        fi
+    done
+
+    qtHostPathSeen+=("$1")
+    return 0
+}
+
+qtHostPathHook() {
+    qtUnseenHostPath "$1" || return 0
+
+    local pluginDir="$1/${qtPluginPrefix:?}"
+    if [ -d "$pluginDir" ]
+    then
+        qtWrapperArgs+=(--prefix QT_PLUGIN_PATH : "$pluginDir")
+    fi
+
+    local qmlDir="$1/${qtQmlPrefix:?}"
+    if [ -d "$qmlDir" ]
+    then
+        qtWrapperArgs+=(--prefix QML2_IMPORT_PATH : "$qmlDir")
+    fi
+}
+addEnvHooks "$hostOffset" qtHostPathHook
+
+makeQtWrapper() {
+    local original="$1"
+    local wrapper="$2"
+    shift 2
+    makeWrapper "$original" "$wrapper" "${qtWrapperArgs[@]}" "$@"
+}
+
+wrapQtApp() {
+    local program="$1"
+    shift 1
+    wrapProgram "$program" "${qtWrapperArgs[@]}" "$@"
+}
+
+qtOwnPathsHook() {
+    local xdgDataDir="${!outputBin}/share"
+    if [ -d "$xdgDataDir" ]
+    then
+        qtWrapperArgs+=(--prefix XDG_DATA_DIRS : "$xdgDataDir")
+    fi
+
+    local xdgConfigDir="${!outputBin}/etc/xdg"
+    if [ -d "$xdgConfigDir" ]
+    then
+        qtWrapperArgs+=(--prefix XDG_CONFIG_DIRS : "$xdgConfigDir")
+    fi
+
+    qtHostPathHook "${!outputBin}"
+}
+
+preFixupPhases+=" qtOwnPathsHook"
+
+isQtApp () {
+    readelf -d "$1" 2>/dev/null | grep -q -F 'libQt5Core'
+}
+
+# Note: $qtWrapperArgs still gets defined even if $dontWrapQtApps is set.
+wrapQtAppsHook() {
+    # skip this hook when requested
+    [ -z "$dontWrapQtApps" ] || return 0
+
+    # guard against running multiple times (e.g. due to propagation)
+    [ -z "$wrapQtAppsHookHasRun" ] || return 0
+    wrapQtAppsHookHasRun=1
+
+    local targetDirs=( "$prefix/bin" )
+    echo "wrapping Qt applications in ${targetDirs[@]}"
+
+    for targetDir in "${targetDirs[@]}"
+    do
+        [ -d "$targetDir" ] || continue
+
+        find "$targetDir" -executable -print0 | while IFS= read -r -d '' file
+        do
+            isQtApp "$file" || continue
+
+            if [ -f "$file" ]
+            then
+                echo "wrapping $file"
+                wrapQtApp "$file"
+            elif [ -h "$file" ]
+            then
+                target="$(readlink -e "$file")"
+                echo "wrapping $file -> $target"
+                rm "$file"
+                makeQtWrapper "$target" "$file"
+            fi
+        done
+    done
+}
+
+fixupOutputHooks+=(wrapQtAppsHook)

pkgs/development/libraries/qt-5/mkDerivation.nix

@@ -1,8 +1,8 @@
-{ stdenv, lib }:
+{ lib, debug, wrapQtAppsHook }:
 
 let inherit (lib) optional; in
 
-{ debug }:
+mkDerivation:
 
 args:
 
@@ -24,7 +24,9 @@ let
 
     enableParallelBuilding = args.enableParallelBuilding or true;
 
+    nativeBuildInputs = (args.nativeBuildInputs or []) ++ [ wrapQtAppsHook ];
+
   };
 in
 
-stdenv.mkDerivation (args // args_)
+mkDerivation (args // args_)

pkgs/development/libraries/qt-5/modules/qtspeech.nix

@@ -3,5 +3,5 @@
 qtModule {
   name = "qtspeech";
   qtInputs = [ ];
-  outputs = [ "out" "dev" "bin" ];
+  outputs = [ "out" "dev" ];
 }

pkgs/top-level/all-packages.nix

@@ -12772,7 +12772,7 @@ in
   qt56 = recurseIntoAttrs (makeOverridable
     (import ../development/libraries/qt-5/5.6) {
       inherit newScope;
-      inherit stdenv fetchurl fetchpatch makeSetupHook;
+      inherit stdenv fetchurl fetchpatch makeSetupHook makeWrapper;
       bison = bison2; # error: too few arguments to function 'int yylex(...
       inherit cups;
       harfbuzz = harfbuzzFull;
@@ -12787,7 +12787,7 @@ in
   qt59 = recurseIntoAttrs (makeOverridable
     (import ../development/libraries/qt-5/5.9) {
       inherit newScope;
-      inherit stdenv fetchurl fetchpatch makeSetupHook;
+      inherit stdenv fetchurl fetchpatch makeSetupHook makeWrapper;
       bison = bison2; # error: too few arguments to function 'int yylex(...
       inherit cups;
       harfbuzz = harfbuzzFull;
@@ -12804,7 +12804,7 @@ in
   qt511 = recurseIntoAttrs (makeOverridable
     (import ../development/libraries/qt-5/5.11) {
       inherit newScope;
-      inherit stdenv fetchurl fetchFromGitHub makeSetupHook;
+      inherit stdenv fetchurl fetchFromGitHub makeSetupHook makeWrapper;
       bison = bison2; # error: too few arguments to function 'int yylex(...
       inherit cups;
       harfbuzz = harfbuzzFull;
@@ -12822,7 +12822,7 @@ in
   qt512 = recurseIntoAttrs (makeOverridable
     (import ../development/libraries/qt-5/5.12) {
       inherit newScope;
-      inherit stdenv fetchurl fetchFromGitHub makeSetupHook;
+      inherit stdenv fetchurl fetchFromGitHub makeSetupHook makeWrapper;
       bison = bison2; # error: too few arguments to function 'int yylex(...
       inherit cups;
       harfbuzz = harfbuzzFull;